Larrau fire, 25 February 2021 Larrau
The fire started on 25 February 2021 in Larrau, France, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 349 hectares from satellite imagery, spread across a single municipality.
This record is most likely a pastoral burn (écobuage) in the Pyrenees, not a forest fire. In winter, grassland and scrub are burnt to renew the pasture, and this fire does not appear in France's official forest fire database (BDIFF). That is why it is left out of the fire rankings.
The power measured by the satellite is low (5.8 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
Suggestions: Larrau · 2019Larrau · 2020Larrau · 2019Larrau · 2026
- Burnt area
- 349ha
- Copernicus perimeter
- Duration
- 1day
- 25 Feb 2021 – 25 Feb 2021
- Municipalities hit
- 1
- communes
- Started on
- 25 Feb
- 2021
- Heat detections
- 1
- in a single hotspot: 6 MW
- Danger at start
- 1
- Very low · FWI index
- Average daily power
- 6MW
- detected power per day, on average
Where it burned
How it evolved, day by day
25 Feb 2021 · 6 MW · 1
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 2 days without rain (1 mm or more) when it started. Rain came after the fire: 7.3 mm on 28 Feb.
This area had burned before
92% of the perimeter overlaps earlier fires recorded since 2016: 320 ha in 2019, 154 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 321 ha that had burned before.
- 286 ha Larrau fire, February 2019 337 ha in total; the hectares shown are those it shares with this fire
- 96 ha Larrau fire, February 2020 104 ha in total; the hectares shown are those it shares with this fire
- 34 ha Larrau fire, February 2019 523 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
349 ha reached on 25 Feb2.8 %
Burnt area inside each municipality, from crossing the official perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
What burned
- Other natural land84 %
- Broadleaved forest9.9 %
- Scrub and transitional woodland3.5 %
- Agricultural areas2.3 %
Natura 2000 protected area affected: 100 %
- LIC Le Saison (cours d'eau) FR7200790
- LIC Montagnes du Pic des Escaliers FR7200751
Natura 2000 sites (European Environment Agency, 2024 release) crossed by the perimeter.
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
The weather day by day
ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.
Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 25 Feb | 14.0 °C | 41 % | 42 km/h | 0.0 mm | Very low 1 |
| 26 Feb after | 10.3 °C | 70 % | 26 km/h | 0.0 mm | Very low 1 |
| 27 Feb after | 8.5 °C | 61 % | 38 km/h | 0.1 mm | Very low 1 |
| 28 Feb after | 6.7 °C | 82 % | 46 km/h | 7.3 mm | Very low 0 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
The smoke
CAMS · CopernicusOn 24 February 2021 the air beside the fire reached 21 µg/m³ of PM2.5. That day averaged 19: 1.3 times the WHO daily guideline (15).
Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.
Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)
Detections table · 1Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 1,172 haLarrau24 February 2026 · 7 days · 1 km away
- 1,316 haAussurucqFebruary 2026 · 7 days · 9 km away
- 2,916 haMendiveFebruary 2019 · 9 days · 15 km away
- 1,965 haLecumberry14 February 2019 · 9 days · 15 km away
- 1,379 haEstérençubyFebruary 2021 · 7 days · 15 km away
- 1,120 haHostaFebruary 2019 · 14 days · 18 km away
Frequently asked questions
- How long did the Larrau fire last?
- Copernicus dates it between 25 February 2021 and 25 February 2021: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 349 hectares (3.5 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Larrau (349 ha, 2.8 %).
- Did the fire reach a town?
- The fire started in Larrau and reached its centre: the point marking it was inside the burnt area or less than 500 metres from it. That does not mean houses burned.
- What was the weather like?
- During the fire the temperature reached 14.0 °C, humidity dropped to 41 % and gusts hit 42 km/h. The fire danger index (FWI) reached 1, class Very low.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of France (geoBoundaries). It is not an official report.
Where to verify it
A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.
Emergency number: 112 · 18 · Emergency number and official warnings ›
Satellite cross-check
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
Does something look wrong on this page?
This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.
Report an error
How we know this
- Perimeter: EFFIS (Copernicus), mapped on satellite imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. One Suomi-NPP VIIRS detection on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
- Probably a vegetation burn: not counted in the totals.
Where this data comes from
The perimeter and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM5 (Open Data Commons Attribution License 1.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.