Fire Tracking

Fire Tracker Guide: How to Track Any US Wildfire in Real Time Before the Smoke Reaches You

📅 September 2026 ⏱ 61 min read ✍ US Wildfire Tracker team

A fire tracker is a map that fuses four separate public data feeds — official incident records, mapped perimeters, satellite heat detections and National Weather Service fire-weather alerts — into one view. This guide explains what each layer means, how fresh it is, and how to act on it.

What is a fire tracker and what does it show?

A fire tracker is a live map that collects wildfire data from several government feeds and renders it as a single picture: where fires are burning, how big they are, how contained they are, and where satellites are still measuring heat. US Wildfire Tracker is one such map, free in any browser.

The word "tracker" matters. Fire tracking is a continuous process, not a lookup: a static map shows a snapshot. A fire tracker keeps re-reading its sources on a schedule and updates the markers, so the map you looked at this morning is not the map you are looking at now. US Wildfire Tracker refreshes automatically every few minutes while the tab or side panel stays open.

The core question a live fire tracker answers is narrow and practical: is there fire between me and where I need to be? Everything else — acreage, containment percentage, incident type, managing agency — exists to help you judge how much weight to put on that answer.

The difference between a fire tracker and a news feed

News coverage is edited. A wildfire becomes a story when it threatens something photogenic or populated, which is usually hours after ignition. Machine data used for fire tracking has no editorial threshold: a satellite reports a thermal anomaly whether it sits above a subdivision or above empty sagebrush 90 miles from the nearest road.

That neutrality cuts both ways. A fire tracker will show you a 4-acre lightning start in a wilderness area that no reporter will ever mention. It will also show you industrial heat sources and prescribed burns that look identical to a wildfire from 512 miles up. Tracking fires well means knowing which is which.

Why a fire tracker exists at all

No single agency publishes everything. The National Interagency Fire Center (NIFC) holds incident records and interagency perimeters. NASA holds the satellite thermal detections. NOAA holds the geostationary heat and smoke analyses. The National Weather Service holds fire-weather alerts. Each publishes separately, in different formats, on different schedules.

A fire tracker's real job is fusion. It reconciles those four streams so that one map marker can tell you "official incident, 3,400 acres, 20 percent contained, last agency update six hours ago, last satellite heat 41 minutes ago" instead of forcing you to check four sites and do the joins in your head.

Those figures come from the National Interagency Coordination Center. The 2026 year-to-date acreage had already passed the full-year 2025 total by early September, while the fire count was lower — a pattern that means fewer, larger fires, which is exactly the situation where a tracker earns its keep.

What a fire tracker is not

A fire tracker is not an emergency service. It does not dispatch engines, it does not issue evacuation orders, and it cannot see the ridge behind your house. Every reputable tracker, including ours, says the same thing: when a county sheriff or fire department orders you out, you go, regardless of what any map shows.

It is also not a predictive model in the fire-behavior sense. It reports observations. Forecast products exist — the NWS issues fire-weather alerts, NOAA runs smoke models — and a good tracker surfaces those, but the map itself is a record of what instruments and agencies have already measured.

Which four data feeds sit behind a fire tracker?

Every credible US fire tracker draws on the same four public sources: NIFC incident records, interagency fire perimeters, NASA and NOAA satellite thermal detections, and National Weather Service fire-weather products. Understanding what each one is — and is not — is the single most useful thing you can learn about wildfire tracking.

These feeds answer different questions when you track fires in practice. Incident records tell you what humans have confirmed and named. Perimeters tell you where the burned edge was when someone last mapped it. Satellite detections tell you where heat was on the last overpass. Weather alerts tell you what conditions are expected next.

Why fusing them beats reading any one alone

A satellite detection with no incident record behind it is a lead, not a fact. An incident record with no recent satellite heat may be a fire that is genuinely out but has not been closed in the database. Cross-referencing the two is how you separate a live problem from a stale row.

That cross-reference is what US Wildfire Tracker turns into a fire probability score. Each detection is graded on whether an official NIFC record is attached, how recent that record's perimeter is, and how fresh the satellite heat is. The result is a tier, not a certainty, and the app says so.

The scale of the data problem

NIFC's own table shows the volume involved. Across the ten years from 2016 through 2025, the United States averaged roughly 63,200 wildland fires and about 7.05 million burned acres per year, by our calculation from the agency's published annual figures. Most of those never make a headline.

Two years in that decade cleared ten million acres: 2020 at 10,122,336 acres and 2017 at 10,026,086. The 2023 season, by contrast, burned 2,693,910 acres — under a third of the 2020 figure. Any tool that claims a "typical" fire season is smoothing over a fourfold swing.

The average-acres-per-fire column is our arithmetic on NIFC's numbers, and it is the column that explains why tracking matters. In 2023 the average fire burned 48 acres. In 2020 it burned 172. The same map, the same feeds, a completely different level of urgency.

NIFC notes on its statistics page that "prior to 1983, the federal wildland fire agencies did not track official wildfire data using current reporting processes," which is why comparisons to earlier decades are unreliable. Treat 1983 as the start of the consistent record when you see long-run charts elsewhere.

That split has a practical consequence for anyone using a fire tracker near a populated area. Human-caused starts cluster along roads, powerlines, campgrounds and property lines — which is to say, near you. They are also the fires most likely to be reported by phone within minutes, so the incident record often appears before the satellite pass.

Lightning fires behave in the opposite order. The satellite frequently sees them first, sometimes hours before a crew reaches the ground, which is why a hotspot with no incident record attached is worth a second look during a dry-thunderstorm outbreak. The live fire tracker guide covers that sequencing in detail.

How do official records reach a fire tracker?

An official incident record is the government's authoritative row for one fire: its name, its acreage, its containment percentage, the agency in charge and the people assigned. NIFC and its interagency partners publish those rows as open data, and a fire tracker reads them on a loop.

The record begins when a fire is reported and an agency creates it in the interagency system. From that moment the fire has an identity that persists across every federal, state and local system touching it. That shared identity is what lets a tracker attach a satellite hotspot to a named fire rather than leaving it as an anonymous dot.

What each field actually means

Acreage is a mapped or estimated burned area, not a live measurement. Early in an incident it is often an aerial estimate rounded hard. It can also go down: when a perimeter is flown properly and the earlier guess proves generous, the official number is revised downward, which surprises people watching a fire tracker.

Containment is the percentage of the fire's edge that has a completed control line around it, not the percentage of the fire that has stopped burning. A fire can be 60 percent contained and still throwing embers across a canyon. The number describes line construction, not extinguishment.

Why records go stale and what to do about it

Agencies update incident rows on operational schedules — typically after the morning briefing and again in the evening — not continuously. On a fast-moving fire that means the published acreage can be many hours behind reality. On a fire that is basically finished, it means the row can sit unchanged for days.

US Wildfire Tracker exposes a "Last NIFC update" timestamp on every fire for exactly this reason, and it lets you toggle outdated records on or off. Hiding them cleans up the map; showing them is useful when you are researching what burned in an area rather than what is burning now.

National situation reporting and preparedness levels

Above individual incidents sits a national picture. The National Interagency Coordination Center publishes a daily national fire news summary and sets a National Preparedness Level from 1 to 5 that describes how much of the country's shared firefighting capacity is already committed.

On September 9, 2026 at 7:30 a.m. Mountain Time, NIFC moved the country to Preparedness Level 3, citing "continued improving fire weather conditions across multiple geographic areas, increasing availability of all nationally shared resource types and light ordering through the National Interagency Coordination Center." That same morning the agency reported 59 active large fires and 14,405 firefighters and support personnel assigned nationwide, in its daily National Fire News summary.

Preparedness level is a resource-scarcity signal, not a danger rating for your address. At higher levels, crews, aircraft and incident management teams are stretched, which means a new start near you may get a smaller initial attack than it would in a quiet week. That is a genuine reason to watch your own area more closely.

The current wildfires guide walks through how to read the daily national summary alongside a map, including what "large fire" means in NIFC's counting and why the national fire count and your local picture can move in opposite directions.

What official records cost the country

The financial scale behind those rows is substantial. NIFC's suppression-cost table records $3,166,300,000 in federal suppression spending in 2023 and $4,389,000,000 in 2021, with a published ten-year average of roughly $2,523,259,200 across the Forest Service and Interior agencies combined.

Those are suppression costs only — the price of fighting fires, excluding property loss, health effects and rebuilding. NOAA has put the broader annual cost of wildfire to the United States at approximately $424 billion, a figure it cited when launching its Wildland Fire Data Portal in January 2026.

How does a fire tracker map draw fire perimeters?

A fire perimeter is a polygon showing the outer edge of the area a fire has burned, mapped by aircraft, GPS-equipped crews or satellite analysis, then published through the interagency perimeter services that a fire tracker map reads. It is the most useful and most misunderstood layer on any fire map.

The critical property of a perimeter is that it is historical. It records where the edge was at the moment it was mapped. On a fire spreading a mile an hour under wind, a perimeter flown at 2 a.m. and published at 9 a.m. is describing a shape the fire abandoned before breakfast.

How perimeters get made

Most large-fire perimeters in the United States come from infrared mapping flights. An aircraft carrying a thermal sensor flies the fire, usually at night when the contrast between hot ground and cool surroundings is sharpest, and an infrared interpreter turns the imagery into a polygon that goes into the interagency system before the morning briefing.

Smaller fires may be walked or driven with a GPS unit, or sketched from a helicopter. Very large or remote fires are increasingly mapped from satellite imagery. Each method has a different precision, and none of them run continuously, which is why perimeters arrive in steps rather than as a smooth animation.

1. A fire grows past the point where ground crews can map it by hand, usually a few hundred acres.
2. An infrared mapping flight is ordered, typically for the overnight hours when thermal contrast is strongest.
3. An infrared interpreter processes the imagery and produces a perimeter polygon plus heat-intensity information.
4. The polygon is published to the interagency perimeter service and picked up by NIFC open data.
5. A fire tracker reads the service on its refresh cycle and redraws the outline on the map.
6. The next flight, usually the following night, produces the next version of the shape.

Reading a perimeter without being misled

Three rules keep you honest. First, always check when the perimeter was last updated, not just what it looks like. Second, assume the fire's active edge is outside the drawn line on any day with wind. Third, remember that a perimeter encloses unburned islands — the polygon is an outer boundary, not a statement that everything inside it is black.

The fourth rule matters most for homeowners: distance from a perimeter is not the same as safety. Embers are the dominant ignition mechanism in community fires. UC Berkeley research summarized by the university found that nearly one-third of house ignitions in major fires are caused by embers rather than direct flame contact.

Historical perimeters and why you would want them

US Wildfire Tracker can also display historical fire perimeters — the outlines of areas that burned in past seasons. That layer answers a different question than the live one: not "where is fire now" but "where has fire already been," which shapes how a new start is likely to behave.

A fire running into a footprint that burned three years ago usually slows, because the fuel has not fully recovered. A fire running into ground that has not burned in fifty years usually accelerates. Overlaying the historical layer on a live incident is the cheapest fire-behavior intuition available to a non-specialist.

Scott Stephens, a professor at UC Berkeley's Rausser College of Natural Resources, framed the long-run consequence of removing fire from these landscapes bluntly: "The effects have been profound. The fires we have today would have been unimaginable 50 years ago," he said in the same university feature.

The last row is the one people forget. A fire with no polygon is not a fire that does not exist; it is usually a fire too new or too small for anyone to have mapped yet. On US Wildfire Tracker those show as detections without an outline, and the fire tracker map guide explains how to distinguish them at a glance.

How does satellite fire tracking detect heat?

Satellite fire tracking works by measuring infrared radiation. Sensors on NASA and NOAA satellites read energy in the shortwave and thermal infrared bands; when a pixel is far hotter than its neighbors, an algorithm flags it as a thermal anomaly. That flagged pixel is what a fire tracker plots as a hotspot.

Two families of satellite do the fire tracking work over the United States, and they trade off against each other. Polar-orbiting satellites fly low and see fine detail but only pass overhead a few times a day. Geostationary satellites sit far out and watch continuously but with coarse pixels. A fire tracker uses both.

Polar orbiters: MODIS and VIIRS

NASA's MODIS instrument flies on the Terra and Aqua satellites at an altitude of 705 km, with a swath 2,330 km wide. Terra crosses the equator at about 10:30 a.m. on its descending node and Aqua at about 1:30 p.m. ascending. The thermal bands MODIS uses for fire work resolve at 1,000 meters.

VIIRS is the newer instrument, carried on Suomi NPP and the NOAA-20 and NOAA-21 satellites. NOAA describes VIIRS as excelling "in capturing detailed imagery of fires both day and night" and notes that "with a spatial resolution of 375 meters per pixel, VIIRS can detect smaller, lower-temperature fires."

The difference between 1,000-meter and 375-meter pixels is not cosmetic. A 375-meter pixel covers roughly one-seventh the ground area of a 1,000-meter pixel, so a fire that merely warms a MODIS pixel can dominate a VIIRS pixel. That is why VIIRS finds the small, early-stage starts that MODIS misses.

VIIRS also carries a Day-Night Band, which NOAA says "measures low-intensity visible light emitted by small and developing fires, enhancing nighttime fire detection." Night is when polar-orbiting detection is at its best, because the surrounding ground has cooled and the contrast is enormous.

Geostationary: what GOES adds

NOAA's GOES satellites orbit 22,236 miles above the equator at a speed matching Earth's rotation, so each one stares permanently at the same hemisphere. GOES-19 currently serves as GOES-East and GOES-18 as GOES-West, together covering the entire United States including Alaska and Hawaii.

The Advanced Baseline Imager aboard each satellite carries 16 spectral bands, "including two visible channels, four near-infrared channels, and ten infrared channels," according to NOAA's GOES-R program. In its standard scan mode it produces a full-disk image every 10 minutes and continental US imagery every 5 minutes.

When something urgent is happening, ABI can be pointed at mesoscale sectors that update "every 60 seconds (or one sub-domain every 30 seconds)." That cadence is what makes geostationary data valuable for watching a fire's heat signal intensify hour by hour rather than waiting for the next polar overpass.

The cost is resolution. The shortwave infrared channels used for fire detection resolve at 2 km, so a quarter-acre grass fire will not register while a fast-growing 500-acre run will light up the pixel grid. GOES tells you about intensity and trend; VIIRS tells you about location and small starts.

Getting the delay down to under a minute

Historically, satellite fire data reached the public after processing at a central facility, which added hours. Direct-broadcast ground stations changed that by receiving the satellite signal as it passes overhead and running the fire-detection algorithm locally.

Liam Gumley, a scientist with the Cooperative Institute for Meteorological Satellite Studies at the University of Wisconsin-Madison's Space Science and Engineering Center, described the result as "the first routine service for detecting wildfires over the continental United States from NASA and NOAA low-Earth orbit satellites with a latency of less than 60 seconds from Earth observation to wildfire detection."

Sub-minute latency does not mean sub-minute discovery. The satellite still has to be overhead. What it removes is the processing delay, so when a polar orbiter does pass over your county during an ignition, the detection is available almost immediately rather than two to three hours later.

What fire radiative power tells you

Alongside location, fire detection algorithms report fire radiative power — a measure of the energy the fire is emitting at the moment of observation. It is a rough proxy for intensity. A rising sequence of radiative-power values across successive detections usually means a fire that is building, not settling.

Most public fire trackers do not display raw radiative power, because it needs context to be meaningful. What they do use it for is internal ranking: a detection with strong radiative power and repeated confirmation across passes deserves more prominence than a single weak pixel. That logic feeds directly into the probability tiers described next.

What does a live fire tracker score mean?

A fire probability score is a confidence tier, not a forecast. On US Wildfire Tracker each detection is graded by fusing three things: whether an official NIFC record is linked to it, how fresh that record's perimeter is, and how recent the satellite heat from VIIRS, MODIS or GOES is.

The purpose is triage. A live fire tracker can easily surface several thousand thermal detections nationwide on a busy day, and most of them are not what a resident means by "a fire near me." The score sorts the map so that the strongest signals draw the eye first.

What raises and lowers a score

The strongest possible signal is a detection that sits inside a current official perimeter, is attached to a named incident with a recent agency update, and has satellite heat measured within the last hour. Everything about it corroborates everything else. That is what a top-tier marker represents.

The weakest is an isolated pixel with no incident record, no perimeter, and heat measured many hours ago that has not repeated on a later pass. It may still be real — it may be a fire nobody has reported yet — but it may equally be an industrial flare, a landfill, a steel mill or a field being burned on purpose.

Weak signals: why they are hidden by default

US Wildfire Tracker hides detections below 25 percent probability by default, and lets you switch them on. That threshold exists because an unfiltered hotspot map is close to unreadable in the western states during summer, and because false positives erode trust faster than missing edge cases do.

There are two situations where turning weak signals on is the right call. The first is during an active lightning outbreak, when genuine new starts appear as single unconfirmed pixels before any agency has a record. The second is when you smell smoke and see nothing on the default view.

How the score should change your behavior

A high-probability detection within a few miles of you is a reason to check evacuation information from your county immediately. A mid-tier detection is a reason to keep the map open and check again in fifteen minutes. A weak signal thirty miles away in a known industrial corridor is a reason to do nothing.

What the score should never do is override an official order. If your county sends an evacuation notice and the map still shows a mid-tier detection, the county wins. Data pipelines have latency; a deputy at your door does not. The fire tracker near me guide sets out that decision order step by step.

Outdated records and the toggle that controls them

Separate from probability, US Wildfire Tracker has a control for outdated records — incidents whose official rows have not been refreshed recently. Off, the map shows what is current. On, it shows the full recent history, including fires that are likely finished but never formally closed.

Researchers, journalists and insurance staff usually want that toggle on, because their question is "what happened in this area over the last month." Residents deciding whether to pack a car usually want it off, because a two-week-old row adds noise without adding safety value.

What do NWS alerts add to fire tracking?

National Weather Service fire-weather products are the only forward-looking layer on a fire tracker. Incident records, perimeters and satellite hotspots all describe what has already happened. A Red Flag Warning describes conditions that have not arrived yet, and it is issued specifically because those conditions make new fires dangerous.

US Wildfire Tracker pulls these alerts from api.weather.gov, the National Weather Service's public API. The NWS states that "all of the information presented via the API is intended to be open data, free to use for any purpose," and it serves active alerts alongside forecasts, observations and zone geometry.

Red Flag Warning versus Fire Weather Watch

The National Weather Service describes a Red Flag Warning as an alert issued "in conjunction with land management agencies, to alert land managers to an ongoing or imminent critical fire weather pattern." A Fire Weather Watch, by contrast, "alerts land managers and the public that upcoming weather conditions could result in extensive wildland fire occurrence or extreme fire behavior."

The practical distinction is timing and confidence. A Watch means the ingredients may come together. A Warning means forecasters are confident they will, or already have. The NWS Denver/Boulder office publishes a Watch lead time of 12 to 72 hours, with Warnings issued when there is high confidence within 24 to 48 hours.

Criteria are local, not national

There is no single national humidity or wind threshold. Each Weather Forecast Office sets criteria appropriate to its fuels and climate, in consultation with land managers. That is why a Red Flag Warning in Colorado and one in Florida describe genuinely different weather.

NWS Tallahassee states that "a Red Flag Warning is issued when the above conditions are expected to be met within the next 24 hours," while "a Fire Weather Watch is issued when the above conditions are expected to be met during the next 24 to 48 hours." Boulder's page defines a Watch as alerting agencies to "the high potential for development of Red Flag criteria."

Extreme fire behavior and what it looks like

The NWS also publishes a description of extreme fire behavior, which it characterizes as fires "likely to rage out of control" that "behave erratically, sometimes dangerously." The listed markers are a high rate of spread, "prolific crowning and/or spotting," the presence of fire whirls, and a strong convection column.

Those four markers are worth memorizing, because they are visible from a distance. A tall, self-sustaining smoke column that leans and then goes vertical is telling you the fire is generating its own weather. That is the point at which a perimeter drawn last night has no relationship to where the fire is now.

Why alerts matter more than any single fire

Most of the acreage in a bad American fire season burns on a handful of days. UC Berkeley professor Scott Stephens quantified the dynamic for California: "In California, we put out more than 98% of wildfires, but the 2% that we can't put out are responsible for burning 95% of the land."

The days when suppression fails are, overwhelmingly, the days that carry fire-weather alerts. That makes the alert layer an unusually efficient thing to watch. You do not need to monitor a fire tracker every day; you need to monitor it hard on the ten or fifteen days a year when your area is under a Warning.

How do you read a fire tracker map in 60 seconds?

Reading a fire tracker map quickly is a fixed sequence, not a browsing exercise: check for alert polygons, look at the strongest markers near you, open the nearest one, read its two timestamps, then decide whether to act or to check again later. The whole loop takes under a minute once learned.

The sequence works because it moves from the widest signal to the narrowest. Weather affects a whole region. A fire affects a corridor. Your decision affects one address. Doing it in the other order — starting with a single dot — is how people either panic over a flare stack or miss the fire two ridges over.

The sixty-second procedure

1. Open the map at wildfire-map.org or in the Chrome side panel and let it finish its first load.
2. Look for National Weather Service fire-weather alert polygons covering your area; if one is active, treat everything else as more urgent.
3. Use "fires near me" or select your state to narrow the view from the national picture to your surroundings.
4. Identify the highest-probability markers within your distance threshold, ignoring weak signals on the first pass.
5. Open the closest one and read "Last NIFC update" and "Last satellite heat" before anything else.
6. Check acres, percent contained and incident type to judge scale and whether it is a planned burn.
7. If the fire is close and active, follow the official link or search InciWeb for the incident, and check your county's emergency page.
8. If you decide to move, use the directions-away-from-the-fire option rather than routing through the incident area.

What each map symbol is telling you

Markers represent detections and incidents. Outlines represent mapped perimeters. Shaded polygons represent weather alerts. Where a marker sits inside its own perimeter outline, the two layers agree and confidence is high. Where a marker sits well outside any outline, you are looking at heat that has not been mapped on the ground.

Basemap choice matters more than people expect. US Wildfire Tracker uses OpenStreetMap as its basemap, which shows roads, tracks and settlement names. When you are judging whether a fire can reach you, the road network is the information you actually need, because roads are both fuel breaks and escape routes.

The five most common misreadings

First, treating a perimeter as current. Second, treating containment as extinguishment. Third, assuming a hotspot with no name is fake. Fourth, assuming a hotspot with a name is close because the name mentions a nearby landmark. Fifth, judging distance by eye at a zoom level where an inch is forty miles.

The fifth is the sneakiest. Zoom level distorts risk perception in both directions: zoomed out, a fire eighty miles away looks adjacent; zoomed in, a fire six miles upwind looks like it is off the edge of the world. Always confirm distance numerically rather than visually, which is what the nearby-fires distance filter is for.

For a layer-by-layer walkthrough with worked examples of each misreading, the dedicated wildfire map guide goes deeper than this summary, including how incident maps, perimeter maps, hotspot maps and risk maps differ in what they are trying to tell you.

How do you use a fire tracker near me search?

A fire tracker near me search uses your browser's geolocation to center the map on your position and list every detection and incident inside a distance you choose, in miles. On US Wildfire Tracker that is the "fires near me" control, and it is the fastest path from opening the map to a usable answer.

Location permission is the one thing that has to happen first. The browser asks; you approve. US Wildfire Tracker uses that position only to find nearby fires — it is never stored, sold or shared — and if you decline, you can still search by state or by panning the map manually.

Choosing the right radius

Distance thresholds are not arbitrary when you track fires around a fixed address. They correspond to different kinds of consequence, and picking the wrong one produces either false alarm or false calm. The table below is the framework we recommend for a first pass, adjusted for terrain and wind.

Terrain overrides the table. A fire five miles away across a broad river valley is a different problem from a fire five miles away at the bottom of the drainage you live in, because fire runs uphill and accelerates in chimneys and chutes. Read the topography, not just the radius.

Why "no fires near me" can still mean smoke

Wildfire smoke travels far beyond the fire. The EPA notes that recent seasons have produced "substantial increases in PM2.5 concentrations across the nation" from fires in the US, Canada and Mexico, and that "smoke has often blanketed large portions of the U.S."

The agency has documented an "expansion in the parts of the country that experience smoke" over the 2006 to 2020 period, and it attributes "thousands of yearly respiratory- and cardiovascular-related Emergency Department (ED) visits, hospital admissions and deaths" to wildfire smoke exposure. Smoke over your town regularly originates a thousand miles away.

So a clean nearby-fires result and a hazy sky are entirely compatible. When that happens, the question shifts from evacuation to air quality, which is a different tool and a different set of thresholds — covered in the forest fire smoke tracker guide.

Urban, suburban and rural differences

In dense urban areas the dominant risk on a fire tracker is not the wildland fire itself but the corridors where development meets open space — canyon mouths, greenbelts, hillside subdivisions. Detections cluster along those edges, and evacuation is complicated by traffic rather than by distance.

In rural areas the geometry inverts. Fires are further away but response is slower, roads are fewer, and a single closed highway can eliminate your only route. Rural users should set a wider radius — 25 or 50 miles — precisely because their reaction time needs to be longer.

The wildland-urban interface between those extremes is where most structure loss happens. The US Fire Administration reports that "more than 60,000 communities in the United States are at risk for WUI fires," citing the National Association of State Foresters. That is not a western statistic; it spans the country.

How do you set up fire tracker app alerts?

Fire tracker app alerts work on proximity: you enable location, the app watches for new incidents inside your area, and it notifies you when one appears. On US Wildfire Tracker, proximity notifications for new incidents near you are available once location is enabled, alongside evacuation orders and warnings and road closures surfaced from official alerts.

Setting this up well takes about five minutes and pays for itself the first time a start happens overnight. The goal is a configuration that wakes you for something that matters and stays silent for a flare stack forty miles away.

The setup sequence

1. Install US Wildfire Tracker from the Chrome Web Store listing, which is free and requires no account.
2. Pin the extension so it is one click away rather than buried in the extensions menu.
3. Open it in the Chrome side panel if you want it visible alongside your work, or in a full tab for map-heavy sessions.
4. Grant location permission when prompted so proximity features and nearby-fire distances can work.
5. Set your distance threshold in miles based on whether you are urban, suburban or rural.
6. Decide whether weak signals below 25 percent probability should be visible; leave them off for daily use.
7. Decide whether outdated records should be visible; leave them off unless you are researching history.
8. Confirm that fire-weather alerts are displayed, since those are your earliest warning of a dangerous day.

The side-panel option is the part regular users end up valuing most. A map in a side panel is glanceable — it sits next to whatever you are actually doing and updates itself, so checking costs a fraction of a second instead of a context switch to another device.

Layering alerts so you are not relying on one channel

No single alert channel is sufficient. FEMA's Ready.gov guidance is explicit: "have several ways to receive alerts," and it recommends monitoring air quality alerts at airnow.gov alongside weather alerts. A fire tracker should be one layer in that stack, not the whole stack.

Ready.gov also advises keeping "your cell phone charged" with backup charging devices, and developing separate plans for "the office, kids' school or daycare and anywhere you frequent." Alert configuration is worth doing for each of those locations, not only for home.

Troubleshooting the two things that usually break

Location denied is the first. If the browser has already remembered a denial, the app cannot re-prompt; you have to clear the site permission in browser settings and reload. Until then, nearby-fire distances will not calculate and proximity notifications will not fire.

Data failing to load is the second, and it is usually upstream. Government feeds go down for maintenance and occasionally under heavy load. US Wildfire Tracker handles this by showing the last saved results rather than an empty map, so check the timestamps before assuming quiet conditions. The fire tracker app setup guide has the full troubleshooting sequence.

One more practical note: the extension runs on Chromium browsers that support Chrome extensions, so Chrome, Edge and other Chromium builds all work. If you would rather not install anything at all, the same map runs in any browser at wildfire-map.org with no extension and no account.

How fresh is the data when you track fires live?

When you track fires on a live map, nothing you see is happening at this instant. Every layer carries a delay: satellites wait for overpasses, agencies update on shift schedules, and infrared flights happen overnight. Knowing the size of each delay is what separates confident reading from guessing.

The honest framing is that on a live fire tracker, "live" means "the freshest thing anyone has published," which on a fast fire can be twenty minutes old and on a quiet fire can be two days old. US Wildfire Tracker publishes the timestamps rather than hiding them, so you can apply the correct discount.

Delay by layer

NOAA's Hazard Mapping System, implemented in 2002 "in response to high demand for active fire and smoke information over North America," follows the schedule in the last two rows. Its smoke product classifies plumes as light, medium or heavy, having replaced the older numeric values 5, 16 and 21 in a data format update on July 19, 2022.

The refresh cycle on your side

US Wildfire Tracker refreshes automatically every few minutes while it is open, and there is a manual refresh button for when you want to force it. If a refresh fails — a feed timing out, a network hiccup — it displays the last saved results rather than blanking the map.

That behavior is deliberate but it creates an obligation: check the timestamps rather than trusting that an open tab equals current data. A tab left open overnight on a laptop that slept will show you last night's picture until it completes a fresh cycle.

Why a fire can look active after it is out

Three mechanisms produce phantom activity. Heat persists in stumps, root systems and duff for days after flaming has stopped, and satellites keep detecting it. Incident rows are not always closed promptly, so a finished fire keeps its marker. And historical perimeters, if the layer is enabled, look much like current ones at a glance.

The diagnostic is the timestamp pair again. Recent satellite heat with a stale record usually means residual smoldering on a fire that crews have moved off. No recent satellite heat plus a stale record almost always means the fire is done and the database has not caught up.

Why a fire can be real and invisible

The reverse failure is more dangerous. A small fire that starts just after a polar overpass may not be seen by VIIRS for hours. Thick cloud attenuates infrared signal. Dense canopy can hide a fire burning underneath it. Terrain shadowing at high satellite viewing angles can cut detection sensitivity.

Geostationary coverage partially fills the gap because it never looks away, but its 2 km pixels need a fire big enough to raise the temperature of a four-square-kilometer patch of ground. Small fires in wet fuels under cloud are the classic detection blind spot, and no public tracker escapes it.

The live fire tracker guide takes this further, including a walkthrough of overpass timing for each satellite and how to estimate when the next useful observation of your area will occur.

Where does fire tracking data get things wrong?

Fire tracking data fails in four predictable ways: false positives from non-fire heat, false negatives from missed detections, positional error in hotspot location, and stale records that outlive the fires they describe. None of these are defects in any particular map; they are properties of the underlying feeds.

Stating them plainly is not a disclaimer exercise. It is the difference between a tool you can rely on and one you will eventually be burned by, because a user who understands the failure modes will cross-check at exactly the moments when cross-checking matters.

False positives: heat that is not wildfire

Thermal anomaly algorithms detect heat, not fire. Gas flares at oil and gas facilities burn continuously and appear night after night in the same pixel. Steel mills, glass furnaces, cement kilns and refineries all radiate strongly. Landfill fires smolder for weeks. Agricultural field burning is seasonal, legal and widespread.

Prescribed fire is the most consequential false positive for public users, because it is real fire deliberately set under a burn plan. It appears on satellite exactly like a wildfire. The distinguishing signal is usually the incident type field on the official record, when a record exists.

Positional error and what it means for distance

A hotspot is reported as a point, but it represents a pixel. For VIIRS that pixel is nominally 375 meters on a side at nadir and larger toward the edge of the swath. For MODIS it is 1,000 meters at nadir. For the GOES shortwave infrared bands it is 2,000 meters.

That means a hotspot point can be off by a meaningful fraction of a mile, and more when the satellite is viewing at a steep angle. When you are measuring whether a fire is four miles or six miles away, a several-hundred-meter uncertainty is tolerable. When you are asking whether a fire is on your side of a ridge, it is not.

Stale records and closed fires

Incident records live until an agency closes them. Fires that go quiet in remote country sometimes stay open for weeks, especially at the end of a season when reporting staff have demobilized. On a map with outdated records switched on, that produces markers for fires nobody has thought about since August.

This is why US Wildfire Tracker separates outdated records behind a toggle and publishes "Last NIFC update" on every incident. The design principle is that the map should never imply currency it does not have.

What no fire tracker can do

No public fire tracker can tell you which way a fire will run tomorrow, whether your specific street will be ordered to evacuate, or whether the fire behind the ridge has spotted over it in the last ten minutes. Those judgments belong to incident commanders and local officials with eyes on the ground.

Retired fire chief Dave Winnacker, quoted in Berkeley Engineering's coverage of interface fire research, put the underlying dynamic in one line: "Fire is opportunistic. And it will find a way to spread. But when you take mitigation measures, communities won't burn." Tracking tells you when to act; mitigation determines what happens when fire arrives.

How does tracking fires differ state by state?

Tracking fires means something different in Oregon than in South Carolina. The federal data feeds are national and identical everywhere, but fire season timing, dominant fuels, the agencies with jurisdiction and the local evacuation vocabulary all change at state lines. A national fire tracker has to be read with local knowledge.

US Wildfire Tracker supports a national view plus a filter for all 50 states and the District of Columbia, which is the practical way to handle this. Set the state filter to where you live and the map stops competing for your attention with fires two time zones away.

Regional fire seasons at a glance

The Great Plains row deserves emphasis because it is the one people underestimate. NOAA's account of Nebraska's Morrill Fire records that it traveled more than 65 miles between detection at 1:40 p.m. and 9:00 p.m. on March 12, 2026, finishing at 642,029 acres. No perimeter product updates fast enough to track a run like that.

California and the wind-driven pattern

California generates the most fire-tracking traffic in the country, and for structural reasons. UC Berkeley's coverage of its fire research notes that the state has burned more than 12 million acres since 2013, while the population has grown from about 10 million in 1950 to more than 40 million today.

Michael Gollner of UC Berkeley summarized the state's exposure directly: "We are front and center in the wildfire crisis. California is beautiful, but everything aligns for fires here." The alignment he means is cured fuel, steep terrain, seasonal offshore wind and dense development pushed into the interface.

The January 2025 Palisades and Eaton fires demonstrated the consequence: more than 16,000 buildings destroyed and 31 deaths, according to the same Berkeley summary. Fires of that character move faster than perimeter mapping, which is why the alert layer and satellite heat matter more than acreage in the first hours.

For county-level detail — which counties, which wind patterns, which agencies publish what — the California fire map guide breaks the state into its regions. For metropolitan Los Angeles specifically, including the canyon corridors and freeway closure patterns, see the LA fires map guide.

The Southeast is not a low-fire region

NIFC's cause statistics make the point quantitatively. In 2025, the Southern Area accounted for 36,040 of the 69,556 human-caused fires nationwide — a little over half. Southeastern fire seasons produce enormous fire counts, mostly small, mostly human-caused, mostly in late winter and spring.

That changes what a fire tracker is for. In the West you are often watching one very large fire for weeks. In the Southeast you are watching many short-lived starts, where the relevant risks are smoke across interstates, debris-burning escapes and burn bans rather than multi-week campaign fires.

South Carolina is a useful case study for this pattern, with pine flatwoods, a spring season and state forestry jurisdiction over most starts. The South Carolina fires guide covers how the state's counties appear on a tracker and what the coastal and upstate differences mean.

Alaska, Hawaii and the special cases

Alaska produces some of the largest fires in the country in acreage terms, in places with almost no road access. Satellite detection is often the entire information picture for days, because nobody is flying infrared over every remote lightning start and there is no perimeter until a fire threatens something.

Hawaii inverts the problem: small land area, tightly packed communities, and grass fuels that carry fire very quickly under trade winds. Detection distances that would feel comfortable on the mainland are not comfortable there, so set a tighter radius.

The wildfire tracker regional guide works through all of these areas in order, including the Rockies, the Great Basin and the Great Plains, with notes on what a wild fire tracker shows in each and how to configure one for travel, ranching or hiking.

What does a fire tracker show you about smoke?

A fire tracker shows smoke as an overlay derived from satellite analysis, and it answers a question the fire layer cannot: where is the air going to be bad. US Wildfire Tracker offers smoke and air-quality overlays alongside the fire data, because most Americans affected by wildfire in any given year are affected by smoke rather than flame.

Smoke and fire are physically linked but geographically separate. A fire in Oregon can degrade air quality in Minnesota. That means a smoke layer needs a different mental model: not "how close is it" but "which way is the plume moving and how thick is it when it gets here."

How smoke is detected and classified

NOAA's Hazard Mapping System produces the underlying smoke analysis for North America. Analysts work from daytime GOES imagery, and the schedule is fixed: the first smoke classification is available between 11:00 a.m. and noon Eastern Time, with a second generally issued between 7:00 and 8:00 p.m. Eastern.

Plumes are classified as light, medium or heavy. Those categories replaced the numeric values 5, 16 and 21 in a format change on July 19, 2022. Because the product is derived from visible-band imagery and human analysis, it describes smoke aloft as well as smoke at ground level, which is an important distinction.

The AQI scale you actually need to know

EPA's AirNow program explains that "the AQI includes six color-coded categories, each corresponding to a range of index values," and that "for each pollutant an AQI value of 100 generally corresponds to an ambient air concentration that equals the level of the short-term national ambient air quality standard for protection of public health."

The CDC identifies children, people with chronic conditions and pregnant individuals as being at higher risk, and states that wildfire smoke "irritates your eyes, nose, throat, and lungs. It can make it hard to breathe and make you cough or wheeze." People with asthma, COPD, heart disease, diabetes or chronic kidney disease need particular caution.

Interface smoke is worse than wildland smoke

When fire burns houses rather than forest, the smoke chemistry changes. Colorado State University research conducted with CU-Boulder found that structure fires emit substantially higher levels of soot and toxic volatile organic compounds than vegetation fires, with modern building materials producing up to ten times more soot than wood alone.

NSF NCAR research summarized by UCAR reaches a compatible conclusion at population scale: emissions from wildland-urban interface fires are proportionately about three times more likely to lead to annual premature deaths than emissions from remote wildfires. Smoke from an interface fire deserves a more conservative response than smoke from a wilderness fire of the same size.

Practical indoor steps

FEMA's Ready.gov guidance is concrete. Designate a sealed room with "a portable air cleaner to keep indoor pollution levels low," set air conditioning to "recirculate" mode if available, keep "an N95 mask to protect yourself from smoke inhalation" in your supplies, and "stay inside in a safe location or go to a community building where smoke levels are lower."

The forest fire smoke tracker guide expands this into a full protocol, including how to combine plume imagery with ground AQI readings, school and outdoor-activity thresholds, and how long a filtered room realistically holds clean air.

Who needs a fire tracker map day to day?

A fire tracker map is not only for people whose homes are threatened. Its regular users are homeowners in the interface, travelers, outdoor workers, journalists, insurance and utility staff, school administrators and anyone managing an outdoor asset. Each group reads the same map for a different decision.

Understanding the use case sharpens the configuration. Somebody deciding whether to cancel a school sports practice needs the smoke layer and AQI. Somebody deciding whether to drive Interstate 5 tomorrow needs incident locations near the corridor. Same tool, different settings.

Travel is the underrated use case

Most people think of fire tracking as a home-safety tool, but the highest-frequency use is travel. Highway closures, campground and forest closures, and smoke reducing visibility to a few hundred feet all affect people who are nowhere near a fire's perimeter. Checking a fire tracker before a long western drive in August costs thirty seconds.

The route-based reading is different from the radial one. Instead of asking what is within 25 miles of home, you trace your intended route on the map and look for incidents within a few miles of it, then check whether any state department of transportation closure is already posted.

Journalists and the citation problem

For anyone publishing about a fire, the map is a starting point and the official record is the citation. US Wildfire Tracker exposes official links on each incident and a "Search on InciWeb" action, which is the correct path from "the map shows X" to "the managing agency states X."

The share-a-link function matters here too: sharing a link to a specific fire is more precise than describing coordinates, and it lets an editor or a colleague open the same incident with the same context rather than reconstructing it.

If you are comparing approaches to fire tracking rather than looking for a specific map, the fire tracking app comparison sets out the trade-offs between a browser side panel, a mobile app, a web map, official agency pages and raw satellite viewers.

What to do when a fire tracker shows fire near you

When a fire tracker shows a high-probability incident close to you, the sequence is: confirm with official sources, prepare to leave, decide on a route, and go when told. The map's role ends at the first step. Everything after that is standard evacuation practice from FEMA and your county.

Preparation done in advance is what makes the map useful. If you have never packed a go bag or identified two exit routes, a fifteen-minute warning is not enough time to start. If you have, fifteen minutes is plenty.

Before anything is burning

Ready.gov's wildfire guidance is specific about home hardening. Establish a "fire-resistant zone that is free of leaves, debris or flammable materials for at least 30 feet from your home," use fire-resistant materials for construction and repairs, and "locate an outdoor water source with a hose that can reach any area of the property."

The evidence that this works is measurable. A 2025 study summarized by UC Berkeley found that houses without a vegetation-free buffer had about a 20 percent survival rate in major wildfires, while houses with one survived at about 37 percent — a 17 percentage point difference from a five-foot strip.

Berkeley's Michael Gollner described the reasoning: "Clearing the vegetation that is closest to the house isn't perfect, but it is one of the cheapest and easiest ways to reduce risk." Modeling in the same body of work suggests that house hardening plus defensible space could prevent the loss of 52 percent of structures in major urban wildfires.

The Ready, Set, Go progression

Most western counties use a three-stage evacuation vocabulary, though the exact words vary by jurisdiction. The first stage means be prepared, the second means be ready to leave at a moment's notice, and the third means leave now. Learn the terms your own county uses before you need them.

Ready.gov states the rule for the final stage without qualification: "evacuate immediately if authorities tell you to do so." If you become trapped, the guidance is to "call 9-1-1 and give your location" and "turn on lights to help rescuers find you," while recognizing that response may be delayed.

Routes and the direction problem

The most common evacuation error is driving toward the fire because that is the way the navigation app routes you. US Wildfire Tracker includes a directions-away-from-the-fire option that hands off to Google Maps, Apple Maps or Waze with a destination on the far side of your position from the incident.

Two routes, not one. Roads close, and the closure is frequently the road you planned to use because it is the road nearest the fire. Identify a primary and a secondary before the season starts, and confirm that the secondary is passable in your vehicle.

After the fire

Ready.gov advises waiting until authorities confirm it is safe to return, then avoiding "hot ash, charred trees, smoldering debris and live embers," noting that "the ground may contain heat pockets." Wear long sleeves, gloves and sturdy shoes, use a respirator, and wet debris down to limit dust.

For documentation, the guidance is to "document property damage with photographs. Conduct an inventory and contact your insurance company." Historical perimeter data on a fire tracker is useful here too, because it establishes what area burned and when, which supports a claim timeline.

Fire tracker glossary: wildfire terms explained

Fire tracking terminology mixes meteorology, satellite remote sensing and incident management, and the same word can mean different things in each. This glossary defines the terms you will actually encounter on a live map, grouped by where they come from.

Incident and suppression terms

Incident

Any occurrence requiring a response, including a wildfire, and the unit of record in interagency systems.

Contained

The proportion of a fire's edge that has a completed control line around it, expressed as a percentage.

Controlled

A later stage than containment, when the line is secure and the fire is not expected to escape.

Out

No burning or smoldering remains; the incident can be closed.

Initial attack

The first suppression response to a new fire, aimed at stopping it while it is small.

Extended attack

Response to a fire that initial attack did not stop, requiring additional resources.

Large fire

In interagency reporting, a fire that has grown past a size threshold and is tracked nationally.

Incident management team

An organized command team assigned to complex incidents, with a typed complexity level.

Mop-up

Extinguishing residual heat inside the line after the fire's spread has stopped.

Control line

Any constructed or natural barrier used to stop the fire's spread, including hand line, dozer line and roads.

Managing organization

The agency or team with command responsibility for an incident.

Total personnel

People assigned to the incident at the time the agency last reported.

Preparedness level

A national 1-to-5 rating of how heavily shared firefighting resources are committed.

InciWeb

The interagency incident information system where agencies publish public updates on major fires.

Map and data terms

Perimeter

A polygon showing the outer boundary of the area a fire has burned, as of the time it was mapped.

Historical perimeter

The mapped outline of an area burned in a previous fire, useful for judging fuel condition.

Satellite hotspot

A pixel flagged by a detection algorithm as substantially hotter than its surroundings.

Thermal anomaly

The formal name for what a hotspot is: an anomalously warm pixel, not necessarily a wildfire.

Fire radiative power

A measure of the energy a fire is emitting at the moment of observation, a rough intensity proxy.

Fire probability score

A confidence tier fusing whether an official record is linked, perimeter freshness and satellite heat recency.

Weak signal

On US Wildfire Tracker, a detection below 25 percent probability, hidden by default and toggleable.

Outdated record

An incident whose official row has not been refreshed recently; shown only when the toggle is on.

Last NIFC update

The timestamp of the most recent refresh of the official incident record.

Last satellite heat

The timestamp of the most recent polar-orbiting thermal detection for that fire.

Last GOES heat

The timestamp of the most recent geostationary heat detection for that fire.

WFIGS

The Wildland Fire Interagency Geospatial Services program, source of interagency perimeter and incident services.

IRWIN

The integration service that gives one fire a single shared identity across agency systems.

Basemap

The underlying reference map; US Wildfire Tracker uses OpenStreetMap for roads and place names.

Satellite and weather terms

MODIS

NASA's Moderate Resolution Imaging Spectroradiometer on Terra and Aqua; 1,000 m fire pixels.

VIIRS

The Visible Infrared Imaging Radiometer Suite on Suomi NPP, NOAA-20 and NOAA-21; 375 m fire pixels.

Day-Night Band

A VIIRS channel measuring low-intensity visible light, improving nighttime detection of small fires.

GOES

NOAA's geostationary satellites, 22,236 miles up; GOES-19 as East and GOES-18 as West.

ABI

The Advanced Baseline Imager on GOES, with 16 spectral bands and 5-minute continental US scans.

Polar orbit

A low, near-polar orbit giving fine detail but only a few passes per location per day.

Geostationary orbit

An orbit matching Earth's rotation, giving continuous coverage at coarser resolution.

Overpass

The moment a polar-orbiting satellite passes within view of a given location.

NOAA HMS

The Hazard Mapping System, producing analyst-reviewed fire and smoke products for North America since 2002.

Red Flag Warning

An NWS alert for an ongoing or imminent critical fire weather pattern, with locally set criteria.

Fire Weather Watch

An NWS alert that upcoming conditions could produce extensive fire occurrence or extreme fire behavior.

Extreme fire behavior

Fire that is spreading fast with prolific crowning or spotting, fire whirls and a strong convection column.

Spotting

New fires started ahead of the main fire by embers carried on wind or convection.

Relative humidity recovery

How much humidity rises overnight; poor recovery keeps fuels dry and fires active after dark.

AQI

EPA's Air Quality Index, six color-coded categories from Good at 0 to 50 up to Hazardous at 301 and higher.

PM2.5

Fine particulate matter, the principal pollutant of health concern in wildfire smoke.

Wildland-urban interface

Where development meets wildland vegetation; where most structure loss occurs.

Prescribed fire

Fire deliberately set under a burn plan; it appears on satellite exactly like a wildfire.

Frequently Asked Questions About Fire Trackers