California

LA Fires Map: How to Track Los Angeles Fires Live and Get LA Fires Updates First

📅 September 2026 ⏱ 67 min read ✍ US Wildfire Tracker team

An LA fires map is a live view of every wildfire burning in Los Angeles County, drawn from official incident records, agency perimeters, satellite heat detections and National Weather Service fire alerts. Read together, those four layers tell you where a fire is, how fast it is moving and whether the wind is about to push it toward you.

What does an LA fires map actually show you?

An LA fires map shows four independent streams of information layered over one basemap of Los Angeles County: official incident records, official fire perimeters, satellite thermal detections and National Weather Service fire-weather alerts. Each stream answers a different question, and each arrives on a different schedule.

The incident record is the agency's own statement about a fire. It carries the name, the acreage, the percent contained, the managing organization and the time of the last update. CAL FIRE's record for the Palisades Fire, for example, lists the Los Angeles City Fire Department as the administrative unit and a start time of January 7, 2025.

The perimeter is a polygon drawn from infrared aircraft mapping and field observation. It is the most legally meaningful shape on any Los Angeles fire map, because evacuation boundaries and damage assessments are built from it. It is also the slowest layer to move, often updating once or twice a day.

Satellite thermal detections are the fastest layer on an LA fires map. Polar-orbiting sensors and geostationary weather satellites both detect heat, and a new detection can appear on a fire map Los Angeles residents are watching within minutes of a spot fire igniting in a canyon that no crew has reached yet.

Fire-weather alerts are the fourth layer of an LA fires map and the one most people ignore when they look for LA fires updates. A Red Flag Warning issued by the National Weather Service office in Oxnard tells you that conditions across a named zone will support explosive fire growth, whether or not anything is burning there right now.

Why one map beats five browser tabs

Los Angeles County is covered by an unusually crowded patchwork of fire agencies, which is the first thing that makes a Los Angeles fire map hard to build. The Los Angeles Fire Department covers the City of Los Angeles and describes itself as protecting more than four million people. The Los Angeles County Fire Department protects 4.1 million residents in 1.2 million housing units across 59 cities and every unincorporated area, with nearly 4,800 personnel.

Add the U.S. Forest Service in the Angeles National Forest, the National Park Service in the Santa Monica Mountains, California State Parks, and independent city departments in Pasadena, Burbank, Glendale, Santa Monica, Beverly Hills, Long Beach, Arcadia and Sierra Madre. A single canyon fire can involve five of them before noon.

That is the practical argument for a fused Los Angeles fire map rather than a stack of agency pages. The US Wildfire Tracker live map pulls official National Interagency Fire Center incident records and perimeters, NASA MODIS and VIIRS thermal detections, NOAA GOES heat detections and National Weather Service alerts into one view, so jurisdiction stops being your problem.

What the map cannot tell you

No LA fires map is an official emergency service, and no fire map Los Angeles residents can open replaces an evacuation order. Perimeters lag the flaming front. Satellite passes miss short-lived fires. Evacuation decisions are made by law enforcement and fire command, not by a map. Treat every layer as evidence, and treat the evacuation order arriving on your phone as the instruction.

Why do LA wildfires follow the same canyons?

An LA fires map looks repetitive year after year because the terrain repeats itself. Los Angeles County is a basin ringed by steep, chaparral-covered ranges cut by narrow canyons that funnel offshore wind. Fires start at the base of those canyons and run uphill and downwind through fuel that regrows on a predictable cycle.

Two mountain systems dominate every LA fires map and shape every fire Los Angeles has fought in the last century. The Santa Monica Mountains run east to west from Griffith Park to Point Mugu, separating the Los Angeles basin from the San Fernando Valley and dropping directly into the Pacific at Malibu. The San Gabriel Mountains rise abruptly north of Pasadena, Altadena, Glendale, La Cañada Flintridge, Azusa and Glendora.

The National Park Service describes the Santa Monica Mountains as one of the largest examples of a Mediterranean-type ecosystem in the world, with wet winters and warm, dry summers, holding over 1,000 plant species in 26 distinct natural communities. Santa Monica Mountains National Recreation Area encompasses 153,785 acres, of which the Park Service manages 23,648.

The San Gabriels are steeper and higher. The Angeles National Forest, established by Executive Order in December 1892, covers roughly 700,000 acres of that range and runs from about 1,200 feet to 10,064 feet at Mount San Antonio. Dense chaparral covers the lower slopes, which is exactly the fuel that carries a wind-driven fire.

The Malibu and Pacific Palisades corridor

Malibu sits where the Santa Monica Mountains meet the ocean, which means an LA fire can reach salt water. The December 2024 Franklin Fire started at Malibu Canyon Road inside Malibu Creek State Park and burned 4,086 acres. Less than a month later the Palisades Fire started southeast of Palisades Drive and burned all the way to the coastline.

This corridor has one structural weakness that shows up on every Los Angeles fire map: escape routes run parallel to the coast rather than away from the hills. Pacific Coast Highway, Topanga Canyon Boulevard, Malibu Canyon Road and Kanan Dume Road are the only practical ways out, and each is a two-lane road through combustible vegetation.

The Altadena and Pasadena foothills

Altadena and the Pasadena foothills sit directly below the steepest part of the San Gabriel front range. Eaton Canyon opens onto a dense grid of homes with almost no transition zone. The Eaton Fire started near Altadena Drive and Midwick Drive on January 8, 2025 and burned 14,021 acres, a modest footprint that produced catastrophic losses because of what was inside it.

Sierra Madre, Arcadia, Monrovia, Duarte and Glendora share the same profile, and each has hosted a fire Los Angeles County had to fight uphill: a wall of chaparral above, a residential grid below, and canyon mouths that accelerate northeast wind. The 2020 Ranch 2 Fire in San Gabriel Canyon burned 4,237 acres in this exact setting.

Santa Clarita, the Antelope Valley and Palos Verdes

North of the San Gabriels the fuel behind LA wildfires changes. Santa Clarita and the I-5 corridor around Castaic and Gorman burn in grass and light brush that carries fire fast but drops intensity quickly. The Hughes Fire reached 10,425 acres near Castaic Lake in January 2025; the 2024 Post Fire near Gorman reached 15,563 acres.

The Antelope Valley around Lancaster and Palmdale produces the highest count of small incidents in the county. CAL FIRE's 2026 records for Los Angeles County are dominated by desert-edge grass fires: the Summit Fire near Llano at 2,690 acres, the Ridge Fire near Gorman at 1,134 acres, the Macy Fire at 1,194 acres and the Dora Fire near Neenach at 850 acres.

Palos Verdes is the county's isolated fire landscape, a coastal peninsula of grass and coastal sage scrub surrounded by dense suburbs. The 2009 PV Fire burned 235 acres above Rancho Palos Verdes. Small acreage, but the peninsula's landslide-prone terrain and limited road network make even a modest fire a serious evacuation problem.

How to use geography when you read the map

When a new marker appears on your LA fires map, the first question is not how big it is. The first question is which drainage it sits in and which way that drainage points. A quarter-acre fire at the mouth of a north-facing canyon on a Santa Ana day behaves differently from a hundred-acre fire on a valley floor.

The second question a Los Angeles fire map should answer is what sits downwind within three miles. In the Santa Monica Mountains and the San Gabriel front range, three miles of downwind terrain is often enough to reach a dense residential grid. Our guide to reading a fire tracker map covers the layer-by-layer mechanics in more detail.

How do Santa Ana winds drive fires in LA?

Santa Ana winds turn ordinary brush fires in LA into unstoppable ones by supplying three things at once: high wind speed, very low humidity and a downhill flow direction that pushes fire toward populated basins. The National Weather Service defines a Santa Ana wind as strong, hot, dust-bearing winds descending to the Pacific Coast around Los Angeles from inland desert regions.

Ariel Cohen, chief meteorologist for the National Weather Service Los Angeles/Oxnard office, described the mechanism to NPR as "a regime of atmospheric flow unique to portions of Southern California, where we have strong high pressure that builds over the Great Basin area."

Cohen continued: as that flow "enters the constrictions in the mountains and the gaps in the mountains, we end up getting an acceleration of that flow offshore and to the coast. It dries out, warms up and creates a very favorable environment for wildfires to spread rapidly and grow explosively."

That compression effect is why the same handful of passes show up in every LA fires update. Newhall Pass, Cajon Pass, Soledad Canyon, the Santa Clara River Valley and the gaps behind Malibu act as nozzles. Air that starts as a broad high-pressure flow over Nevada and Utah arrives at Sylmar or Altadena two or three times faster.

What a normal event looks like versus a historic one

Cohen gave the working numbers: typical Santa Ana strengths are "on the order of, say, 30-60 miles per hour when they occur a couple times a year." Those events are routine. Los Angeles gets several every autumn and winter, and most produce nothing worse than downed branches and a few small roadside fires.

The January 2025 event was not routine. Cohen said the region "ended up with a widespread, life-threatening and destructive windstorm" in which "local wind gusts measured upwards of 100 miles per hour." At least 32 stations across the Los Angeles area recorded gusts of at least 70 mph on January 8, 2025.

The highest reading was 100 mph at Mt. Lukens Truck Trail, about 20 miles north of downtown Los Angeles. Whitaker Peak, roughly 50 miles northwest, recorded 97 mph. The last comparable Santa Ana event had occurred more than 13 years earlier, on November 30 to December 1, 2011.

The Santa Ana Wildfire Threat Index

Predictive Services publishes the Santa Ana Wildfire Threat Index, a five-level forecast product that blends wind strength and fuel moisture. The levels are No Rating, Marginal, Moderate, High and Extreme. At the Extreme level the official description is that upon ignition, fires "will have extreme growth, will burn very intensely, and will be uncontrollable."

That last phrase is the one worth internalizing. It is an official forecast statement that suppression will not work. When the index reaches Extreme for Los Angeles County, the useful question is no longer whether crews will stop a fire but whether you are positioned to leave before one starts near you.

Why humidity matters as much as wind speed

Santa Ana air descends thousands of feet, and descending air compresses and warms. Warm air holds more moisture at the same absolute humidity, so relative humidity collapses. Single-digit readings are common in Los Angeles County during a strong event, and fine fuels equilibrate to that dryness within hours.

The drought background behind that week's LA wildfires multiplied the effect. Since October 1, 2024, the start of the water year, downtown Los Angeles had received 0.16 inches of rain by early January 2025, against an average of 4.64 inches by that point in the season. Live fuel moisture in the chaparral was at or near record lows across the county.

Sundowner and onshore reversals

Santa Ana winds are not the only wind pattern a fire map Los Angeles residents rely on has to convey. When an offshore event collapses, the marine layer pushes back inland, and the fire that was running west suddenly runs north or east into fuel it had not yet touched. Perimeters redraw dramatically on those reversal days.

Onshore flow also traps smoke over the Los Angeles basin. Once the pressure gradient relaxes, the basin's inversion caps the smoke column at a few thousand feet and holds it against the mountains. That is why air quality in the San Gabriel Valley often gets worse two days after a fire's most explosive run, not during it.

Reading wind on the map itself

Wind direction is rarely drawn on an LA fires map, but it is visible indirectly. A long, narrow plume of satellite detections stretching away from the incident marker is a wind vector. When new detections stop extending in one direction and start appearing on the flanks, the wind has eased or shifted.

Perimeter shape on a fire map Los Angeles readers are watching carries the same signal. A wind-driven fire produces an elongated teardrop with the ignition point near the narrow end. A fire burning in light wind produces a rounder shape that grows uphill. Comparing today's perimeter to yesterday's tells you which regime you are in.

What do Red Flag Warnings mean for an LA fire?

A Red Flag Warning on your LA fires map is the National Weather Service's statement that fuel dryness and weather have combined to support extreme fire behavior in a named zone. The NWS glossary says it is issued when an event is ongoing or the forecaster has high confidence that Red Flag criteria will occur within 24 hours; a Fire Weather Watch may precede it.

Los Angeles is covered by the NWS Los Angeles/Oxnard office, and that office publishes its own numeric thresholds. For every zone except the Antelope Valley, a Red Flag Warning requires dry fuels plus one of two wind-and-humidity combinations, sustained for six hours or more.

Those thresholds sit behind every Red Flag polygon on an LA fires map, and they come straight from the office's published Red Flag criteria sheet. Knowing them changes how you read a warning. A warning issued on the 10-percent-humidity pathway means the air is drier than the wind is strong, which favors ember ignition over rapid frontal spread.

Particularly Dangerous Situation language

When forecasters expect conditions well beyond the Red Flag threshold, they add "Particularly Dangerous Situation" wording to the warning. It is deliberately rare. In January 2025 the NWS Los Angeles office used it ahead of the wind event, and its own social posts warned of "A LIFE-THREATENING, DESTRUCTIVE, Widespread Windstorm."

If you see that phrase in an LA fires update attached to a Los Angeles County zone, treat it as a pre-evacuation trigger rather than a weather note. It is the strongest routine language the agency has, and it is issued specifically because the forecast exceeds what the standard warning conveys.

The city's Red Flag parking program

Los Angeles has its own operational trigger that sits alongside the federal one. The city's Red Flag Parking Restrictions Program has been active since January 1, 2006. When LAFD declares a Red Flag Day, parking is prohibited in posted areas inside the Very High Fire Hazard Severity Zones.

The city's own definition is narrower than the NWS one: a Red Flag Day is declared when wind speeds are 25 mph or more and humidity is 15 percent or less. More than 1,700 signs mark the restricted stretches, chosen by station commanders as narrow roads, hairpin turns and intersections that become choke points during a mass exodus.

According to LAFD, the maximum number of Red Flag days in past years has been 12, and the average is 4 to 7 per year. Illegally parked vehicles are towed, because a single parked car on a hairpin in Laurel Canyon can stop an engine company and trap the street behind it.

What a Red Flag Warning should change in your routine

1. Move your vehicle out of any posted Red Flag zone and park it facing the direction you would drive out.
2. Charge phones and any battery bank the night before, because Public Safety Power Shutoffs frequently accompany these events.
3. Open your LA fires map in a pinned tab or side panel so new detections appear without you searching for them.
4. Confirm your address's evacuation zone identifier and write it on paper, not only in an app.
5. Postpone brush clearance, grinding, welding and mowing. LAFD rules prohibit brush clearance on Red Flag days for exactly this reason.
6. Agree on one out-of-area contact number that every household member will text if you get separated.

Public Safety Power Shutoffs and the map

The California Public Utilities Commission notes that utilities may temporarily turn off power to specific areas to reduce the risk of fires caused by electric infrastructure. Six investor-owned utilities are authorized to do it, including Southern California Edison, which serves much of the San Gabriel Valley, Santa Clarita and the Antelope Valley.

Shutoffs matter for anyone following LA fires updates in a mundane way. When the power goes, home Wi-Fi goes, and cell sites run on batteries with limited runtime. Download or screenshot your evacuation zone boundaries before the wind arrives rather than assuming you will have connectivity when you need them.

What the January 2025 LA wildfires actually did

The January 2025 LA wildfires produced the second and third most destructive fires in California's recorded history within about 12 hours of each other. CAL FIRE's Top 20 Most Destructive list ranks the Eaton Fire second with 9,413 structures destroyed and 19 deaths, and the Palisades Fire third with 6,833 structures destroyed and 12 deaths.

The first of the two January 2025 LA wildfires started on January 7, 2025 southeast of Palisades Drive in Pacific Palisades, with the Los Angeles City Fire Department as administrative unit. CAL FIRE's incident record lists 23,448 acres; the agency's statistical summary lists 23,707. It was declared extinguished on January 31, 2025.

The Eaton Fire started hours later, at 2:18 UTC on January 8, 2025, near Altadena Drive and Midwick Drive on the Altadena and Pasadena boundary, with the Los Angeles County Fire Department as administrative unit. It burned 14,021 acres and was also declared extinguished on January 31, 2025.

The other January 2025 incidents

A fire map Los Angeles residents opened that week was not showing two fires. CAL FIRE's Los Angeles County records for January 2025 include the Hurst Fire at 799 acres near Diamond Road in Sylmar, the Lidia Fire at 348 acres on Soledad Canyon Road in Acton and the Woodley Fire at 30 acres in the Sepulveda Basin, all on January 8.

January 9 brought the Sunset Fire at 42.8 acres in the Hollywood Hills, which triggered evacuations across a densely populated hillside. January 10 brought the Archer Fire at 19 acres on Sesnon Boulevard in Granada Hills. The Sepulveda Fire on January 23 burned 45 acres beside the 405 near Getty Center Drive.

The largest of the secondary fires in LA that month was the Hughes Fire, which started on January 22 near Lake Hughes Road by Castaic Lake and reached 10,425 acres. Any one of those would have been the county's headline fire in a normal month. That density is why single-incident pages were unusable and a county-wide fires in LA view was the only practical read.

How the numbers moved during the event

Containment and damage figures on a live LA fires map are provisional, and January 2025 shows how far they move. In its January 22, 2025 media update, Los Angeles County reported the Eaton Fire at 91 percent contained with 9,418 structures destroyed and 1,073 damaged, and the Palisades Fire at 68 percent contained with 6,662 destroyed and 890 damaged.

At that point the LA fires update from the county listed 27 confirmed deaths. CAL FIRE's final tallies, published in its statistical summaries dated August 4, 2026, settled at 19 deaths for Eaton and 12 for Palisades. The lesson for map readers is that structure and fatality counts trail the fire by weeks and sometimes months.

What the investigations concluded

The Los Angeles County Fire Department determined that electrical arcing on an out-of-service Southern California Edison transmission tower in Eaton Canyon caused the Eaton Fire. Investigators documented two arcing events in quick succession, with burning material falling into dry brush and the fuel bed igniting about 12 seconds later.

Fire Chief Anthony C. Marrone said in announcing the finding: "I recognize that no report or investigation into the Eaton Fire can ease the deep pain and tragedy our residents have endured." Southern California Edison spokesman David Eisenhauer said the utility "believes that it is likely that its equipment was associated with the ignition of the Eaton Fire."

CAL FIRE's Top 20 Most Destructive list records the Palisades Fire's cause as arson. Both determinations arrived long after the fires were out, which is normal. A live LA fires map will almost never show a confirmed cause during an active incident, and speculation in that window is worthless.

Which layers matter on a Los Angeles fire map?

On an LA fires map the four layers answer four different questions and disagree with each other constantly. Incident markers tell you what an agency has declared. Perimeters tell you where the fire has been. Satellite detections tell you where heat is now. Weather alerts tell you what the atmosphere is about to do.

Reading a Los Angeles fire map in the right order is the whole skill. Start with the weather alert layer, because it sets the ceiling on how bad anything can get today. Then read satellite detections for movement. Then read the perimeter for scale. Read the incident record last, because it is the slowest of the four.

Incident records from NIFC and CAL FIRE

The incident records behind any fire map Los Angeles agencies publish come from the interagency system that CAL FIRE, the U.S. Forest Service and county departments all feed. Each record carries a name, an administrative unit, a discovery time, an acreage, a containment percentage and a last-update timestamp. The US Wildfire Tracker map surfaces the timestamp explicitly as "Last NIFC update."

That timestamp is the single most useful field on the panel. A record last updated nine hours ago on a 60 mph wind day is not describing the fire in front of you. A record updated 20 minutes ago is. Judge every acreage figure by the age of the record it sits in.

Records also carry the managing organization, which in Los Angeles County tells you a great deal. An incident administered by the Los Angeles County Fire Department is in the county's jurisdiction and will appear in county alerts. One administered by the Angeles National Forest will be reported through federal channels with a different update cadence.

Official perimeters

Perimeters on a fire map Los Angeles agencies feed are polygons produced by infrared mapping flights and field GPS. They are authoritative and slow. During the January 2025 event, wind grounded aircraft for long stretches, which meant the mapped perimeter for both major fires lagged reality by hours at the worst possible moment.

The correct interpretation of a perimeter is "the fire has at least reached here." It is a floor, not a ceiling. Treat the ground between the perimeter edge and the nearest fresh satellite detection as burning or about to burn, and treat everything downwind of that as at risk from ember cast.

Satellite thermal detections

Three satellite families matter for a Los Angeles fire map. NASA's MODIS instruments have flown since the early 2000s and give coarse resolution with long history. VIIRS, on the NOAA-NASA polar satellites, gives much finer resolution and is the workhorse for detecting new starts in canyon terrain.

NOAA's GOES geostationary satellites sit over the Western Hemisphere and scan continuously rather than on orbital passes. GOES resolution is coarse, but its refresh rate is measured in minutes, which is why it often produces the very first machine signal that something has ignited above Altadena or behind Malibu.

US Wildfire Tracker shows all three as separate timestamps on each fire: "Last satellite heat" for the polar sensors and "Last GOES heat" for the geostationary detections. Comparing those two fields tells you whether the fire is currently producing heat or whether you are looking at a stale detection from an earlier pass.

The fire probability score

Raw satellite heat feeding an LA fires map is noisy. Industrial flares, refinery operations, prescribed burns and solar farm glint all produce thermal anomalies. In a county with the Port of Los Angeles, refineries in Carson and El Segundo and utility-scale solar in the Antelope Valley, false positives are a daily reality.

US Wildfire Tracker addresses this with a fire probability score. Each detection gets a probability tier that fuses whether an official NIFC record is linked to it, how fresh the NIFC perimeter is and how recent the VIIRS, MODIS or GOES heat signal is. Weak signals below 25 percent probability are hidden by default.

You can turn weak signals on when you want maximum sensitivity during a wind event, and you can toggle outdated records on when you are reconstructing what happened. The app warns explicitly that hotspots can reflect prescribed burns or industrial heat, which is the honest framing.

Filters that matter in Los Angeles

Three controls do most of the work on a Los Angeles fire map. The state filter narrows the national view to California. The "fires near me" function uses browser geolocation to show incidents within a set distance in miles. The fire list panel gives you a sortable text view when the map is too crowded to read.

Location is used only to find nearby fires and is never stored, sold or shared. For a county where the difference between a fire eight miles away and a fire two miles away decides your whole evening, a distance-filtered view is more useful than any amount of zooming. Our fires near me guide covers the setup in detail.

How do LA County evacuation zones work?

Los Angeles County and the City of Los Angeles both use zone-based evacuation. Instead of describing boundaries by street names over the radio, authorities assign every address to a pre-drawn polygon with a short alphanumeric identifier, then issue orders and warnings against those identifiers.

The terminology is standardized statewide by the California Governor's Office of Emergency Services. An evacuation warning means there is impending danger to life or property; Cal OES advises that anyone who needs extra time to evacuate, or who has large animals, should pack up and leave when a warning is issued.

An evacuation order means there is an immediate threat to life and residents need to leave right now. Cal OES adds that if a warning is given you should assume an order will follow, and that officials may not have time to knock on every door.

Finding your zone before you need it

Zone identifiers quoted in an LA fires update look like short codes made of a community abbreviation and a number. They are meaningless until you know yours. Look it up on a quiet afternoon, write it on the inside of a kitchen cabinet door, and put it in the group chat where your household actually talks.

Do the same for every address that matters to you: your home, your workplace, your children's schools, and any relative you would need to collect. During the January 2025 event, families lost time driving to addresses that were already inside an ordered zone because nobody had checked in advance.

How zone orders interact with what you see on the map

On an LA fires map, evacuation polygons and fire perimeters are different shapes for different purposes. A zone under order will often be far larger than the burned area, because incident commanders build in time and margin. Seeing an ordered zone that dwarfs the mapped fire is normal and correct.

The reverse also happens on an LA fires map. Satellite detections can appear outside every ordered zone when embers start spot fires ahead of the front, or when a new, unrelated ignition begins nearby. That gap is the single most valuable thing a live map adds to the official alert stream.

US Wildfire Tracker surfaces evacuation orders and warnings and road closures from official alerts alongside the incident data, so you are not switching between an alert page and a map to work out whether a new detection sits inside or outside an ordered polygon.

Animals, and why warnings exist at all

Cal OES singles out people with large animals in its warning definition because moving horses out of the Santa Monica Mountains, Shadow Hills, Sunland-Tujunga, Acton or Agua Dulce takes hours and trailers. Los Angeles County has substantial equestrian populations in precisely the areas that burn.

If you keep horses or livestock, the evacuation warning is your order. Waiting for the order itself means competing for road space with everyone else and towing a trailer through canyon roads that are already carrying evacuation traffic in one direction and apparatus in the other.

Access and functional needs

Households with members who use wheelchairs, oxygen concentrators, dialysis or in-home nursing need a longer lead time than any warning provides. Register with the county's list for individuals who need additional assistance, and treat a Red Flag Warning with a Particularly Dangerous Situation tag as the moment to relocate voluntarily.

Power-dependent medical equipment deserves its own plan. Southern California Edison and the Los Angeles Department of Water and Power both serve parts of the county, and a shutoff in one utility's territory does not imply anything about the other. Know which one serves your address.

Which roads close first during fires in LA?

During fires in LA the first closures are canyon roads and coastal state routes, not freeways. Caltrans District 7 covers Los Angeles and Ventura counties, and its closure notices for wildfire almost always begin with two-lane mountain roads that run through the burning fuel itself.

The pattern in every LA fires update is consistent because the geography is. Any road that climbs from the basin into the Santa Monica Mountains or the San Gabriels passes through continuous chaparral with no shoulder and no defensible width. Those roads close early, stay closed longest and reopen last.

Why freeway closures are the real disruption

On an LA fires map, canyon roads close often. Freeways close rarely, and when they do the effect on evacuation is disproportionate. The 2019 Getty Fire burned 745 acres beside the 405 near Sepulveda Boulevard; the 2017 Skirball Fire burned 422 acres in the same pass; the 2025 Sepulveda Fire burned 45 acres near Getty Center Drive.

None of those was a large fire by acreage. All three closed or constricted the busiest north-south route on the Westside during peak hours. That asymmetry is worth internalizing: on an LA fires map, a 40-acre fire touching a freeway can matter more to your evening than a 4,000-acre fire in the backcountry.

The same logic applies to the I-5 corridor when fires in LA reach the grade. The Hughes Fire near Castaic in January 2025 and the Post Fire near Gorman in June 2024 both sat against the only continuous route between Los Angeles and the Central Valley. When that corridor constricts, regional traffic reroutes through Santa Clarita surface streets.

Hard closures, soft closures and re-entry

During a fire Los Angeles County has ordered evacuated, a hard closure means no traffic at all, including residents with proof of address. A soft closure allows residents and essential workers through at officer discretion. During large incidents the closure type changes hour by hour, and the officer at the cone has final authority regardless of what any map shows.

Re-entry after an LA fire is managed by zone and usually requires the area to be cleared for downed power lines, gas leaks, hazardous debris and unstable structures. Utility restoration and debris hazard assessment routinely keep zones closed for days after the flames are gone.

Planning routes before the wind arrives

1. Identify two exits from your neighborhood that do not share a single choke point, and drive both at least once.
2. Note which of your routes crosses a Very High Fire Hazard Severity Zone; that stretch is the one that will close.
3. Decide in advance where you would go if the closer exit is blocked, and share that destination with your household.
4. Keep the tank above half through the Santa Ana season, because station pumps fail during power shutoffs.
5. Store a paper map of the county in the car; navigation apps reroute you into congestion during mass evacuations.

US Wildfire Tracker includes directions away from a fire through Google Maps, Apple Maps or Waze from each fire's detail panel, which is the opposite of what a routing app does by default. It also lets you share a link to a specific fire, which is the fastest way to tell a neighbor exactly which incident you mean.

How bad does LA air quality get in a fire?

Air quality in the Los Angeles basin degrades faster and lingers longer during wildfire than in most American metros, because the same inversion that traps ozone in summer traps smoke in winter. South Coast AQMD regulates air quality for Los Angeles, Orange, Riverside and San Bernardino counties, covering more than 17 million people.

That is 44 percent of California's population inside one air district. The district runs continuous monitors at nearly 40 permanent locations plus 10 community sites near large refineries, which is why smoke advisories in Los Angeles can be issued for specific valleys rather than for the whole region.

The Air Quality Index quoted in every LA fires update has six color-coded categories. Values from 0 to 50 are Good; 51 to 100 Moderate; 101 to 150 Unhealthy for Sensitive Groups; 151 to 200 Unhealthy; 201 to 300 Very Unhealthy; and 301 and higher Hazardous, described by EPA as a health warning of emergency conditions where everyone is more likely to be affected.

Why the particles matter more than the smell

EPA defines PM10 as inhalable particles generally 10 micrometers and smaller, and PM2.5 as fine inhalable particles generally 2.5 micrometers and smaller. For scale, the average human hair is about 70 micrometers in diameter, roughly 30 times larger than the largest fine particle.

Wildfire smoke is dominated by PM2.5, which penetrates deep into the lungs. Los Angeles County Public Health describes wildfire smoke as a mixture of small particles, gases and water vapor, and identifies the small particles as the primary health concern, causing burning eyes, runny nose, scratchy throat, headaches and bronchitis.

Urban LA wildfires add a second problem. When structures burn, the smoke carries combustion products from building materials and household contents rather than just vegetation. That is why post-fire ash cleanup guidance in Los Angeles County is stricter after a wildland-urban interface fire than after a backcountry burn.

Who is at higher risk

LA County Public Health lists children, older adults, pregnant individuals and people with heart or lung conditions or weakened immune systems as being at higher risk. Dr. Davis added the point that most people miss: "Smoke and ash can harm everyone, even those who are healthy."

The department advises everyone in areas with visible smoke, the smell of smoke, or unhealthy air quality to avoid unnecessary outdoor exposure and to limit physical exertion, indoors or outdoors. Sensitive groups are told to stay indoors as much as possible even where smoke cannot be seen or smelled.

What actually reduces your exposure

1. Close windows and doors and run air conditioning that recirculates rather than drawing outside air.
2. Use filters rated MERV13 or higher, which LA County Public Health identifies as most effective for removing smoke particles.
3. Add a HEPA air purifier in the room where you sleep to further reduce indoor particles.
4. Wear an N95 or P100 mask if you must be outside for long periods in heavy smoke or where ash is present.
5. Avoid fireplaces, candles and vacuuming, and clean dusty surfaces with a damp cloth instead.
6. Cancel outdoor sports and practices in areas with visible smoke, soot or ash, as the department advises schools and recreational programs to do.

The department is also blunt about the limits of masks: when smoke lingers, fine particles build up indoors even when you cannot see them, and most masks block larger particles but not fine particles or toxic gases. Filtration and staying indoors do more than any mask you can buy at a hardware store.

Reading smoke on the map

US Wildfire Tracker surfaces smoke and air-quality overlays alongside the other LA fires map layers, which lets you see the offset between the fire and the plume. In Los Angeles that offset is often large: a fire in the Angeles National Forest can leave the San Gabriel Valley clear while filling the Santa Clarita Valley.

Satellite heat detections on an LA fires map give you an independent read on smoke source strength. A fire producing dense clusters of fresh detections is producing a heavy plume, even if the official acreage has not been updated. Our smoke tracking guide explains how to combine plume, wind and monitor data.

Which LA neighborhoods need a fire map most?

Every Los Angeles neighborhood that touches undeveloped hillside needs an LA fires map, but the risk is not evenly distributed. The highest-consequence areas share three features: continuous chaparral within a few hundred feet of homes, a limited number of exits, and alignment with a canyon that funnels offshore wind.

The county's Very High Fire Hazard Severity Zones formalize which parts of a Los Angeles fire map matter most. Inside them, the City of Los Angeles enforces brush clearance year-round and posts Red Flag parking restrictions. If your address is inside a VHFHSZ, an LA fires map is not a curiosity; it is part of your household infrastructure.

Pacific Palisades, Brentwood and Topanga

This stretch of the eastern Santa Monica Mountains, the origin of the most costly of recent LA wildfires, combines steep canyons, high property density and few exits. The Palisades Fire started southeast of Palisades Drive and reached 23,448 acres. Topanga sits in a canyon with essentially two ways out, both of which pass through continuous fuel.

Brentwood and the ridgelines above Sunset Boulevard sit between the Palisades corridor and the Sepulveda Pass, where the Getty and Skirball fires both burned. Residents here should watch two separate corridors, because an ignition in either can produce orders on their street.

Malibu, Calabasas and Agoura Hills

The western Santa Monica Mountains produced one of the largest LA wildfires on record, the Woolsey Fire of November 2018, which burned 96,949 acres and destroyed 1,643 structures. The December 2024 Franklin Fire burned 4,086 acres from Malibu Canyon Road. This corridor has burned repeatedly and will burn again.

What distinguishes it on an LA fires map is the fire's ability to run the full width of the range from the 101 corridor to the ocean in a single wind-driven push. When a fire starts on the inland side near Simi Valley or Chatsworth on a strong Santa Ana day, Malibu is downwind.

Altadena, Pasadena and the San Gabriel foothills

Altadena and the Pasadena foothills experienced the Eaton Fire, second on CAL FIRE's Top 20 Most Destructive list. Fourteen thousand acres produced 9,413 destroyed structures because the fire's footprint overlapped a dense residential grid rather than open forest.

The same profile extends east through Sierra Madre, Arcadia, Monrovia, Duarte, Azusa and Glendora, and west through La Cañada Flintridge and Glendale. The 2011 windstorm that toppled thousands of trees and cut power to more than 200,000 homes hit this exact belt, mostly in Altadena and Pasadena.

Sylmar, Sunland-Tujunga and the Verdugo Hills

The northern San Fernando Valley sits at the mouth of Newhall Pass, one of the strongest wind channels in the county. The 2019 Saddle Ridge Fire burned 8,799 acres from Saddle Ridge Road in Sylmar; the 2025 Hurst Fire burned 799 acres near Diamond Road in the same area.

The Verdugo Hills between Burbank, Glendale and Sunland-Tujunga produced the La Tuna Fire in September 2017 at 7,194 acres, and the Creek Fire near Kagel Canyon in December 2017 at 15,619 acres. This is an island of steep brush surrounded on all sides by dense housing.

Santa Clarita, Castaic and the Antelope Valley

Santa Clarita's contribution to LA wildfires is different in character. Grass and light brush burn faster but with lower intensity than mature chaparral, and the developed areas have wider roads and newer construction standards. The Hughes Fire reached 10,425 acres near Castaic Lake without the structure losses seen in the foothills.

The Antelope Valley generates the county's highest incident count. CAL FIRE's 2026 Los Angeles County records are dominated by Lancaster, Palmdale, Neenach and Fairmont grass fires in the hundreds of acres. Individually small, collectively they mean this is where an LA fires map is busiest during summer.

Palos Verdes and the coastal south

The Palos Verdes Peninsula produces few fires in LA but is an isolated block of coastal sage scrub and grassland ringed by suburbs, with a road network that follows the coastline and the ridge. The 2009 PV Fire burned 235 acres above Rancho Palos Verdes. Acreage understates the problem: evacuation options here are genuinely limited.

Whichever of these you live in, the practical setup is the same: open a fire map Los Angeles residents can filter to their own area, know your evacuation zone, and check both before a wind event rather than during one. The statewide California fire map guide covers how LA fits into the wider state picture.

How do you get LA fires updates in real time?

Reliable LA fires updates come from three independent channels working together: push alerts that reach you without being asked, a live map you check on your own schedule, and broadcast radio that works when data networks fail. Relying on any one of them alone is how people miss the message that matters.

The push layer that complements an LA fires map starts with Wireless Emergency Alerts. LA County describes them as messages sent directly to cellphones, geographically targeted, that look like text messages but use a distinct sound and vibration repeated twice. They require no signup, but you should confirm the setting is enabled on each device.

The county also operates a registration-based notification system that carries LA fires updates, and dozens of cities inside the county run their own. Los Angeles County's list names separate systems for Long Beach, Pasadena, Glendale, Burbank, Malibu, Calabasas, Beverly Hills, Culver City, Santa Monica and many more.

That fragmentation is the practical argument for registering with every system that covers an address you care about. If you live in an unincorporated area and work in Pasadena, you need both, because an alert issued by one jurisdiction does not reach subscribers of another.

The broadcast layer

For any large fire Los Angeles County declares, the Emergency Alert System uses designated Local Primary radio stations that agree to carry county messages and relay them to other stations. Local Primary 1 stations are KFI 640 AM, KNX 1070 AM and KBIG 104.3 FM. Local Primary 2 stations are KROQ 106.7 FM and KCBS 93.1 FM.

Write those frequencies down before the next LA fire. During a Public Safety Power Shutoff with cell congestion, a battery radio tuned to 640 AM is the most reliable information channel available, and it costs nothing to keep one in a drawer. The county also distributes NOAA Weather Radios using Specific Area Message Encoding for areas with poor cell coverage.

Where a live map fits

Alerts tell you when someone in authority has decided you are at risk. A live LA fires map tells you what is happening before that decision is made. In the gap between an ignition and the first official alert, which can be 20 minutes or two hours, satellite detections are the only public signal available.

US Wildfire Tracker refreshes automatically every few minutes while open, and if a refresh fails it shows the last saved results rather than an empty screen. It also offers proximity notifications for new incidents near you when location is enabled, which turns the map from something you check into something that tells you.

Because the extension opens in the Chrome side panel, it can sit beside whatever you are already doing during a wind event rather than competing for a tab. You can also open the same map at wildfire-map.org in any browser, on desktop or phone, with no account.

Building a routine that survives a bad week

1. Enable Wireless Emergency Alerts on every phone in the household and verify with a test if your carrier offers one.
2. Register with the county system and with each city system that covers your home, work and school addresses.
3. Pin an LA fires map filtered to California in your browser side panel during Santa Ana season.
4. Turn on proximity notifications so new detections near you surface without you looking.
5. Keep a battery or hand-crank radio with the Local Primary frequencies written on the case.
6. Agree on one household check-in channel and one out-of-state contact, because local circuits congest first.

If you want the general version of this workflow rather than the Los Angeles version, the complete fire tracker guide walks through alert setup, data sources and map reading for any part of the country.

Which historic LA fires shaped today's maps?

Los Angeles County appears on California's deadliest and most destructive fire lists more often than any other county, and each of those fires changed a rule that shapes what you see on an LA fires map today. Griffith Park in 1933, the Loop Fire in 1966, the Station Fire in 2009 and Woolsey in 2018 each produced lasting operational change.

The deadliest of all LA wildfires by any measure, the 1933 Griffith Park fire, killed 29 people on 47 acres and sits second on CAL FIRE's Top 20 Deadliest California Wildfires list. It remains the clearest demonstration in the state's record that acreage and lethality are unrelated variables, which is why no useful LA fires map ranks incidents by size alone.

The Loop Fire and the modern fire shelter

The Loop Fire burned 2,028 acres in Pacoima Canyon in November 1966 and killed 12 members of a Forest Service hotshot crew caught in a chimney as the fire ran uphill. It ranks tenth on CAL FIRE's deadliest list. Twelve deaths on two thousand acres is the signature of terrain, not fuel volume.

That fire Los Angeles County still studies is one of the reasons modern wildland fire operations treat slope-driven chimney runs as a distinct hazard class, and it is why any Los Angeles fire map reader should note the shape of the drainage a fire sits in rather than the number beside its name.

The Station Fire and the limits of a single map layer

The Station Fire began on August 26, 2009 on Highway 2 about a mile and a half north of the Forest Service's Angeles Crest Station and burned 160,577 acres, the largest fire in Los Angeles County's modern record. It burned for weeks in terrain where mapping flights were the only practical way to update a perimeter.

A fire of that size in the San Gabriels demonstrates why satellite detections and official perimeters have to be read together. The perimeter is authoritative but coarse in time; the satellite layer is granular in time but noisy. Neither is sufficient on its own in steep, remote country.

The Woolsey Fire and the trans-range run

Woolsey started on November 8, 2018 at E Street and Alfa Road south of Simi Valley and burned 96,949 acres across Los Angeles and Ventura counties, destroying 1,643 structures. It crossed the 101 freeway and ran to the Pacific, demonstrating that the Santa Monica Mountains can burn end to end in a single event.

For map readers the lesson is about scale of concern. If you live in Malibu and a fire starts near Simi Valley on a Santa Ana day, that fire is your fire. The relevant distance is not the straight line to the flames but the length of unbroken fuel between you and them.

2017 through 2020: the modern baseline

The four years before the pandemic set the pattern for LA wildfires that the region now treats as normal. December 2017 brought the Creek Fire at 15,619 acres near Kagel Canyon, the Rye Fire at 6,049 acres in Valencia and the Skirball Fire at 422 acres beside the 405, all within days.

October 2019 brought the Saddle Ridge Fire at 8,799 acres, the Tick Fire at 4,615 acres in Canyon Country and the Getty Fire at 745 acres. August 2020 brought the Lake Fire at 31,089 acres near Lake Hughes and the Ranch 2 Fire at 4,237 acres in San Gabriel Canyon.

September 2024 brought the largest of that year's fires in LA, the Bridge Fire, at 56,030 acres across Los Angeles and San Bernardino counties. The pattern across all of these is that Los Angeles County reliably produces multiple simultaneous incidents, which is precisely the situation a single-incident page handles badly and a county-wide map handles well.

What the history means for how you read a map

Three rules for reading an LA fires map fall out of the record. First, small fires in the wrong place kill more people than large fires in the right place. Second, the same corridors reburn, so a fire in a place that has burned before will move the way the last one did. Third, simultaneous incidents are the norm in Los Angeles, not the exception.

Those rules are why a county-scale view beats a single-fire view here, and why the age of each data layer matters more than its precision. Our guide to tracking current wildfires covers how to prioritize when several incidents are active at once.

How fast do satellites update an LA fires map?

Satellites update an LA fires map on two different clocks. Geostationary NOAA GOES satellites scan continuously and can flag a large new heat source within minutes. Polar-orbiting NASA sensors pass overhead several times a day, giving much sharper detail but only when the orbit brings them over Southern California.

That split explains most of the confusion people have with the satellite layers on an LA fires map. A fire can be visibly burning from your window with no polar-orbit detection on the map, simply because the next VIIRS pass has not happened yet. It can also show a GOES detection with no VIIRS pixel, or the reverse.

What each sensor family contributes

MODIS instruments have the longest record and the coarsest resolution of any sensor on a Los Angeles fire map. They are excellent for continuity with historical data and for confirming that a large fire is still producing heat, but they are poor at resolving a quarter-acre spot fire in a narrow canyon.

VIIRS is the sensor most people are actually looking at when they see a cluster of hotspot dots along a fire's flank. Its finer resolution makes it far better at detecting new starts in Los Angeles County's tight drainages and at showing the shape of an active fire front.

GOES trades resolution for cadence. It cannot resolve small fires, but because it stares at the same hemisphere continuously it frequently produces the very first machine-detectable signal of an ignition. For a wind-driven fire above Altadena or in Topanga, that head start is measured in tens of minutes.

Why detections can be wrong in Los Angeles specifically

Los Angeles County contains an unusual density of legitimate industrial heat, and all of it can reach an LA fires map. Refineries in Carson, Wilmington and El Segundo, flares at the Port of Los Angeles, and utility-scale solar installations in the Antelope Valley all produce thermal signatures that a heat sensor can register.

Prescribed burns and pile burning in the Angeles National Forest add another category of true-but-not-alarming detections. This is exactly why US Wildfire Tracker attaches a probability tier to each detection rather than plotting every thermal anomaly as a fire, and why the app warns that hotspots can reflect prescribed burns or industrial heat.

The probability score fuses three things: whether an official NIFC record is linked to the detection, how fresh the linked perimeter is, and how recent the satellite heat is. Detections below 25 percent probability are hidden by default, which keeps the Los Angeles view readable on an ordinary day.

Why detections can be missing

Cloud cover blocks the thermal sensing that puts LA wildfires on the map in the first place. So does thick smoke over a long-burning fire, which is why detections sometimes thin out over the interior of a large incident while remaining dense along the active edge. Small, smouldering or heavily shaded fires can be missed entirely.

Timing matters too, and a small fire Los Angeles crews reach quickly may never register at all. A fire that ignites and is knocked down within 40 minutes by a fast LAFD response may never appear in a polar-orbit pass at all. That is a good outcome, not a data failure, but it means absence of a detection never proves absence of fire.

Reading timestamps like a professional

The practical discipline on a fire map Los Angeles readers use is to read every layer's age before reading its content. US Wildfire Tracker shows "Last NIFC update," "Last satellite heat" and "Last GOES heat" as separate fields for each fire, so you can tell at a glance whether you are looking at a live picture or a historical one.

A useful heuristic during a wind event: if the newest of those three timestamps is more than 90 minutes old, assume the fire has moved further than the map shows. If the GOES timestamp is fresh but the NIFC record is hours old, the fire is active and the agency has not published yet.

For a deeper walk through how these feeds behave and what latency to expect, see our guide to live fire tracking, which covers the same mechanics without the Los Angeles-specific geography.

How accurate is any LA fires map you open?

Any LA fires map is exactly as accurate as its newest data layer and no more. Accuracy is not a single property of the map; it is a property of each field on it, and the four layers degrade at different rates. Knowing which field is stale is more useful than knowing which map is best.

Acreage is the LA fires map field people trust most and should trust least during an active push. Agencies publish acreage when a mapping product is available, so a figure can be six hours old while the fire has doubled. In January 2025, aircraft were grounded by wind for long periods, which stretched that lag further.

Containment is the field people misread most in an LA fires update. A fire at 60 percent containment is not 60 percent extinguished. It means 60 percent of the perimeter has a completed control line. The uncontained 40 percent is where all the growth happens, and it is often the section facing the community.

The January 2025 revision trail

The January 2025 LA wildfires give a clean example of how much numbers move. On January 22, Los Angeles County reported the Eaton Fire with 9,418 structures destroyed and 1,073 damaged, and 27 confirmed deaths across both fires. CAL FIRE's final statistical summary lists 9,413 destroyed for Eaton and 19 deaths.

Acreage moved too. CAL FIRE's incident record for the Palisades Fire lists 23,448 acres; the agency's Top 20 Most Destructive summary lists 23,707. Neither is wrong. They are different products compiled at different times with different mapping inputs, and a careful reader cites which one they are using.

What a probability tier is really telling you

When US Wildfire Tracker assigns a detection a probability tier, it is answering a narrow question: how confident should you be that this heat signal corresponds to a real, currently burning wildland fire? A high tier means an official record is linked, the perimeter is fresh and the satellite heat is recent.

A low tier means one or more of those supports is missing. That does not make it noise. During the first 30 minutes of a new ignition, before any agency has created a record, a genuine fire will score low precisely because the official layer has not caught up. Turning weak signals on during a wind event is the right call.

Honest limitations worth repeating

• A live map is not an official emergency service, and it does not issue evacuation orders.
• Satellite detections lag by minutes to hours and miss small or smouldering fires under cloud.
• Official perimeters update on agency schedules, not on the fire's schedule.
• Hotspots can reflect prescribed burns, agricultural burning or industrial heat sources.
• Structure and fatality counts published during an incident are provisional and usually rise.
• Percent contained describes control line completion, not extinguishment.

Stating those plainly is not a weakness of the tool; it is the condition for using it well. The most dangerous LA fires map is one that presents a single confident number with no indication of its age, because it invites you to stop checking.

Cross-checking without leaving the map

Each fire's detail panel in US Wildfire Tracker includes official links and a "Search on InciWeb" action, so you can move from the fused view to the managing agency's own page in one step when a decision depends on the official wording. Incident type, managing organization and total personnel appear when NIFC provides them.

Personnel count is an underrated signal on a fire map Los Angeles residents check during a major push. A Los Angeles County incident that jumps from 200 to 1,500 assigned personnel between updates is being treated as a major event by the people who can see it directly, regardless of what the acreage field currently says.

What should you do when fires in LA start?

When fires in LA start near you, the correct sequence is short: confirm the threat, confirm your zone, decide, then move. Los Angeles County's canyon geography punishes hesitation more than almost anywhere else in the United States, because the roads out are the same roads the fire is crossing.

The first minute belongs to your senses, not your LA fires map. If you can see a column or smell smoke strongly, start preparing to leave while you check the map. The map's job is to tell you which direction is safe, not to tell you whether to take the situation seriously.

The first ten minutes

1. Open your LA fires map and find the incident marker; note its distance and the direction of the newest satellite detections.
2. Check the fire-weather layer for a Red Flag Warning covering your zone, and note the wind direction relative to your street.
3. Check whether your evacuation zone is under a warning or an order, using the identifier you wrote down in advance.
4. Move vehicles out of the garage, facing outward, with keys in them and windows closed.
5. Put the go-bag, medications, documents and pet carriers by the door you will actually use.
6. Text your out-of-area contact where you are and where you intend to go, then stop using voice calls.

The six P's

For any fire Los Angeles residents must flee, LAFD publishes a memorable packing list: people and pets; papers, phone numbers and important documents; prescriptions, vitamins and eyeglasses; pictures and irreplaceable memorabilia; personal computers including hard drives and disks; and plastic, meaning credit cards and cash.

The department's framing matters as much as the list. Its evacuation guidance opens by saying that leaving early gives your family the best chance of surviving a wildfire and helps firefighters by keeping roads clear so they can move in and out of the neighborhood.

If you cannot leave

Sheltering in place during an LA fire is a last resort, chosen when leaving is more dangerous than staying, usually because the roads are already involved. Close all windows and doors, remove flammable curtains, fill sinks and tubs, move to the side of the structure farthest from the fire, and keep a phone with you.

Los Angeles County Fire Chief Anthony Marrone noted during the January 2025 fires that a significant number of people who did not heed evacuation orders were injured in the Palisades Fire. Late evacuation into a fire front is consistently more dangerous than either leaving early or sheltering in a defensible structure.

Preparing the house before the season

LAFD brush clearance rules for Very High Fire Hazard Severity Zones require year-round compliance on native brush, weeds, grass, trees and hazardous vegetation within 200 feet of any structure, and within 10 feet of any combustible fence or roadway used for vehicular travel.

Specifics from the city's requirements: grass cut to 3 inches; trees taller than 18 feet trimmed so no foliage is within 6 feet of the ground; foliage no closer than 10 feet from a chimney outlet; and 5 feet of vertical clearance between roof surfaces and overhanging trees.

The ordinance also governs how you do the work. Metal cutting blades must be non-ferrous and non-sparking, a fire extinguisher or pressurized hose must be within 10 feet of the operation, a charged phone capable of dialing 911 must be accessible, and brush clearance is prohibited on Red Flag days.

The seasonal framing for LA wildfires has a limit, and the region's chief meteorologist named it directly. Ariel Cohen told NPR: "We're not talking about just a fire season. It's a fire year." That is the operating assumption behind every recommendation in this section.

What happens after LA wildfires are contained?

After LA wildfires are contained, the hazard changes rather than ending. Burn scars on steep San Gabriel and Santa Monica slopes lose the vegetation and soil structure that absorbed rain, and the first significant storm can produce debris flows that travel far beyond the burned area.

The U.S. Geological Survey describes postfire debris flows as fast-moving mixtures of water, mud, rocks and vegetation that surge downslope like flowing concrete. They often move faster than a person can run, are typically triggered by short bursts of intense rainfall, and can occur during the first storm following a wildfire.

Los Angeles County has a documented history of exactly this. USGS records a postfire debris flow in the area burned by the 2016 Fish Fire in Los Angeles County, triggered by heavy rainfall on January 20, 2017. The Station Fire scar produced years of debris basin management above the foothill communities.

Why the LA burn scar problem is unusually acute

Three factors compound after LA wildfires in this county. The slopes below the San Gabriel front range are among the steepest urban-adjacent terrain in the country. The soils are granitic and shed material readily. And the communities sit directly at the canyon mouths where a flow would exit, with no buffer.

The timing after fires in LA is worse still. California's rainy season begins within weeks of the peak Santa Ana fire period, so a November or January fire can face its first heavy rain while the scar is still completely bare. The Eaton Fire scar faced rain in February 2025, barely two weeks after containment.

What the map shows after the fire

An LA fires map's value does not end at containment. Historical fire perimeters remain available as a layer, and in Los Angeles County that layer is a working document rather than a curiosity. Overlaying last season's perimeters on today's map tells you where the debris flow risk sits and where the fuel has been removed.

US Wildfire Tracker offers optional historical fire perimeters and shows a historical perimeter alongside the current one on each fire's detail panel. For an Altadena or Sunland resident, that is the fastest way to see whether the hillside above their street burned in the last three years.

Reburn risk is the other side of the same Los Angeles fire map layer. Chaparral that burned two years ago carries fire poorly; chaparral that burned twenty-five years ago carries it extremely well. Knowing the age of the fuel above your neighborhood is a genuine input to how seriously you take a given Red Flag Warning.

Ash, cleanup and water

Los Angeles County Public Health publishes specific ash cleanup and food safety guidance after urban-interface fires, because the ash from burned structures is chemically different from vegetation ash. The department directs residents to follow those instructions rather than sweeping or hosing ash into storm drains.

The practical rules are consistent: wet ash lightly rather than dry-sweeping it, wear an N95 or P100 and gloves, keep children and pets away from ash-covered surfaces, and do not use leaf blowers. Filters rated MERV13 or higher help indoors while ash remains on outdoor surfaces.

Rebuilding and the long tail

After a destructive fire Los Angeles agencies have contained, structure counts continue to rise for weeks as damage inspection teams work through neighborhoods. The gap between the January 22, 2025 county figure of 9,418 destroyed for Eaton and CAL FIRE's final 9,413 shows that the numbers can also be revised downward as duplicate or misclassified records are resolved.

Cause determinations take far longer. The Los Angeles County Fire Department's report attributing the Eaton Fire to electrical arcing on an out-of-service Southern California Edison tower came more than a year and a half after the fire. Expect a live map to show no cause at all for any active incident.

Which LA fires map terms confuse people most?

The terms that confuse people most on an LA fires map are the ones that sound like plain English but carry precise operational meanings: contained, controlled, order, warning, perimeter, hotspot and probability. Each one has a definition set by an agency, and misreading any of them leads to a bad decision.

The LA fires map glossary below uses the definitions the issuing agencies actually publish, so you can match what you see on a map to what you hear on the radio during an LA fires update.

Evacuation Warning

Cal OES: impending danger to life or property. Anyone needing extra time, or with large animals, should leave when the warning is issued. Assume an order will follow.

Evacuation Order

Cal OES: immediate threat to life. Leave right now and follow directions from law enforcement.

Red Flag Warning

NWS: issued for an ongoing event, or when forecasters have high confidence Red Flag criteria will occur within 24 hours.

Fire Weather Watch

NWS: issued ahead of a possible Red Flag Warning when confidence or timing is lower.

Particularly Dangerous Situation

Wording added to a Red Flag Warning when conditions are expected to exceed normal warning criteria substantially.

Red Flag Day (City of LA)

Municipal declaration triggering parking restrictions, made when wind is 25 mph or more and humidity is 15 percent or less.

Santa Ana wind

NWS glossary: strong, hot, dust-bearing winds descending to the Pacific Coast around Los Angeles from inland desert regions.

Percent contained

The share of the fire's perimeter with a completed control line. Not a measure of how much of the fire is out.

Official perimeter

Polygon from infrared mapping and field GPS. Authoritative but usually hours behind the flaming front.

Satellite hotspot

A thermal anomaly detected by VIIRS, MODIS or GOES. Evidence of heat, not proof of a wildfire.

Fire probability score

A tier fusing whether an official NIFC record is linked, how fresh the perimeter is, and how recent the satellite heat is.

Very High Fire Hazard Severity Zone

State-designated mapping category that triggers brush clearance rules and Red Flag parking enforcement in Los Angeles.

Public Safety Power Shutoff

CPUC: utilities may temporarily turn off power to specific areas to reduce the risk of fires caused by electric infrastructure.

Postfire debris flow

USGS: fast-moving mixture of water, mud, rocks and vegetation that surges downslope, often faster than a person can run.

SAWTi

Santa Ana Wildfire Threat Index. Five levels from No Rating to Extreme, blending wind strength and fuel moisture.

Hard closure

Road closed to all traffic, including residents with proof of address.

Temporary Evacuation Point

A staging location where evacuees receive information and onward shelter assignment.

AQI

Air Quality Index. Six color-coded categories, where 100 corresponds to the level of the short-term national ambient air quality standard.

Numbers worth memorizing

Some figures come up often enough in coverage of LA wildfires that knowing them saves you a lookup. The two most useful are the NWS Los Angeles/Oxnard Red Flag thresholds and the AQI category breakpoints, because both convert a headline into an action.

Terms that mean different things in different mouths

"Under control" is not an official LA fires map term and does not mean the same thing as contained. "Fully contained" means the control line is complete around the entire perimeter; a fire can remain fully contained and still burn interior fuel for weeks, producing satellite detections that alarm people unnecessarily.

"Evacuated" is used loosely in broadcast coverage to mean both ordered and warned areas. When you hear a number of people evacuated, check whether the underlying figure counts residents under order, under warning, or both. The difference is frequently a factor of two or more.

"Structures" in CAL FIRE's destructive-fire statistics includes homes, outbuildings such as barns, garages and sheds, and commercial properties destroyed. That is why a structure count is always higher than a home count, and why the two should never be compared across sources without checking the definition.

For the full cross-country version of this vocabulary, including the federal incident-management terms that appear on interagency records, see the glossary in our wildfire tracker guide.

Frequently Asked Questions About the LA Fires Map