Fire Map Guide

Best Live Active Fire Maps (2026)

Almost every live fire map shows the same NASA detections. What separates them is coverage, latency, and whether you can confirm a hotspot against real imagery. Compared honestly, by job.

Open the live fire map Open the Watchfloor

Quick answer — what Off-Nadir Delta is

Most live fire maps render the same underlying data: NASA FIRMS active fire detections from VIIRS (375 m) and MODIS (about 1 km). So pick by the job. NASA FIRMS is the authoritative source and the fastest — within three hours globally, 30 minutes for the US and Canada. NASA Worldviewadds smoke and large-area context. EFFIS covers Europe, the Middle East and North Africa with fire perimeters and danger forecasts. Zoom Earth shows the live weather conditions around a fire. Off-Nadir Delta is for the next step: confirming a hotspot against 10 m Sentinel-2 optical or Sentinel-1 SAR on the same map, since a thermal detection is a heat pixel, not a mapped burn.

Live fire maps compared at a glance

Facts last reviewed 2026-08-23.

Fire map	Detections	Coverage	Update cadence	Account to view	Verify hotspot with 10 m imagery
NASA FIRMS	VIIRS 375 m, MODIS ~1 km	Global	Within 3 h globally; 30 min for US/Canada	No	No
NASA Worldview	VIIRS and MODIS thermal, plus smoke and aerosol layers	Global	Near real-time	No	No
EFFIS (Copernicus EMS)	Hot spots and fire perimeters	Europe, Middle East, North Africa	Daily, with fire-danger forecast up to 6 days	No	No
Zoom Earth	Geostationary weather and hazard imagery	Global	Near real-time	No	No
Off-Nadir Delta	VIIRS 375 m, MODIS ~1 km (NASA FIRMS)	Global, back to 2000	Daily	No	Yes (free account for the map)

Latency and resolution figures for NASA FIRMS are from NASA's own FIRMS documentation; EFFIS details are from the Copernicus Emergency Management Service. Redistributors inherit the source latency and usually add their own, so a map described as “live” is not necessarily as current as FIRMS itself. Off-Nadir Delta is an independent project and is not affiliated with NASA, ESA, the European Commission, or Zoom Earth.

Why a hotspot is not the same as a fire

A fire map shows thermal detections: pixels where a sensor measured enough heat to trigger the algorithm. That is a strong signal and a weak description. It does not tell you the extent of the burn, whether the source is a wildfire or a gas flare, or what was lost.

Detection

A thermal sensor flags a hot pixel — 375 m for VIIRS, about 1 km for MODIS. Fast and global, but a point, not a perimeter.

Confirmation

10 m optical imagery shows the burn scar; SAR sees through the smoke and cloud that usually cover a fire in its first days.

Context

What is nearby, who reported it, and whether it matters — the part a hotspot layer leaves entirely to you.

The best live fire maps, by job

NASA FIRMS

Best as the source of the detections themselves

NASA’s Fire Information for Resource Management System distributes near-real-time active fire detections from MODIS (Terra and Aqua) and VIIRS (S-NPP, NOAA-20 and NOAA-21), as an online map, email alerts and downloads.

Best for:: Getting the authoritative detections — and the download or alert feed behind them — straight from the source.
Limitation:: It gives you thermal hotspots, not context: no high-resolution imagery of the burn itself and no explanation of what is around it.

NASA Worldview

Best for smoke, aerosol and large-area context

A free NASA web app that browses, compares and animates over 1,000 imagery layers, often within hours of overpass — thermal anomalies alongside smoke, aerosol and true-colour layers.

Best for:: Seeing the fire in context: where the smoke is going and how the event looks at regional scale.
Limitation:: Coarse resolution — hundreds of metres — so it shows the plume and the region, not the fire line.

EFFIS (Copernicus EMS)

Best for Europe, with fire danger forecasts and burnt-area mapping

The European Forest Fire Information System, run by the European Commission’s Joint Research Centre as part of the Copernicus Emergency Management Service. Beyond hot spots it publishes fire perimeters, fire-danger forecasts and post-fire damage assessment.

Best for:: European, Middle Eastern and North African fires, and for the forecast side — what the danger looks like over the coming days.
Limitation:: Regional by design: it does not cover fires outside its European, Middle Eastern and North African mandate.

Zoom Earth

Best for live conditions around the fire

A live map specialising in near-real-time weather and hazard imagery from geostationary satellites, refreshed in minutes.

Best for:: Watching current conditions — storms, wind and cloud — that shape how a fire behaves.
Limitation:: Geostationary frames refresh fast but are coarse, and it is built for conditions rather than analysis of the burn.

Off-Nadir Delta(that’s us)

Best for verifying a hotspot with 10 m satellite imagery

A live NASA FIRMS map that runs on the page with no login or API key — switch between VIIRS (375 m) and MODIS (1 km) and pick any date back to 2000 — and, on the map, pull Sentinel-2 optical or Sentinel-1 SAR over the same place to see the burn scar rather than only the hotspot.

Best for:: Going from "there is a detection here" to "here is what the ground actually looks like, and what else is happening around it".
Limitation:: The hotspots are the same NASA FIRMS detections everyone else shows, served daily rather than at FIRMS’s 3-hour cadence — for the freshest possible detection, go to FIRMS directly.

Frequently Asked Questions

What is the best live fire map?▼

For the detections themselves, NASA FIRMS — nearly every other fire map, including this one, is a view onto the same FIRMS data. Choose by what you need on top of it: NASA Worldview for smoke and large-area context, EFFIS for Europe and for fire-danger forecasts, Zoom Earth for live weather conditions around the fire, and Off-Nadir Delta when you want to verify a hotspot against 10 m Sentinel imagery on the same map.

How fast is satellite fire detection?▼

NASA FIRMS makes near-real-time detections available within about three hours of the satellite observation globally. For the United States and Canada there are faster options: real-time data within 30 minutes of overpass, and ultra-real-time data within five minutes for selected direct readout stations. Maps that redistribute FIRMS inherit its latency and often add their own, so check the cadence rather than assuming "live" means instant.

What is the difference between VIIRS and MODIS fire detections?▼

Resolution and age. VIIRS active fire detections are delivered at 375 m nominal resolution and pick up smaller fires; MODIS detections are about 1 km. MODIS, on Terra and Aqua, has the longer record — useful when you need history — while VIIRS, on S-NPP, NOAA-20 and NOAA-21, is the finer instrument for current events. Most fire maps let you switch between them.

Why does a hotspot not always mean a wildfire?▼

Thermal sensors detect heat, not fire type. Gas flares, industrial furnaces, agricultural burning and even hot bare ground can register, and a detection is a pixel-level signal rather than a mapped fire perimeter. That is why confirming a hotspot against higher-resolution imagery matters: a burn scar is visible in Sentinel-2 optical, and Sentinel-1 SAR can see through the smoke and cloud that often hide the area right after a fire.

Are these fire maps free?▼

The ones compared here are free to view without an account: NASA FIRMS, NASA Worldview, EFFIS and Zoom Earth, and the Off-Nadir Delta fire map, which is keyless and anonymous. Opening 10 m Sentinel imagery over a hotspot on the Off-Nadir Delta map needs an account, and a free one is enough to start.

Can I see the burn scar, not just the hotspot?▼

Yes, but not from the thermal detection itself. A burn scar shows up clearly in Sentinel-2 optical imagery at 10 m, and burn severity is commonly assessed by comparing before-and-after scenes. When smoke or cloud blocks the optical view — common in the first days of a large fire — Sentinel-1 SAR still sees the surface, because radar provides its own illumination and passes through cloud.