Chalileo fire, 4 November 2025 Chalileo
The fire started on 4 November 2025 in Chalileo, Argentina, and satellites saw it burning for 2 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,667 hectares from heat detections, spread across a single municipality.
It is the 109th largest in La Pampa since 2016 (of 190 with a page). Number 77 in Argentina in 2025, of 206.
- Burnt area
- 2,667ha
- GWIS perimeter (Copernicus)
- Duration
- 2days
- 4 Nov 2025 – 5 Nov 2025
- Municipalities hit
- 1
- departments
- Started on
- 4 Nov
- 2025
- Heat detections
- 43
- in a single hotspot: 78 MW
- Danger at start
- 77
- Very extreme · FWI index
- Average daily power
- 124MW
- detected power per day, on average
Where it burned
How it evolved, day by day
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 7 days without rain (1 mm or more) when it started. Rain came after the fire: 30.8 mm on 6 Nov.
This area had burned before
53% of the perimeter overlaps earlier fires recorded since 2016: 1,053 ha in 2016, 98 ha in 2018, 451 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 1,410 ha that had burned before.
What happened to each town
-
Chalileo where it started2,670 ha reached on 4 Nov0.3 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
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) |
|---|---|---|---|---|---|
| 4 Nov | 28.1 °C | 17 % | 63 km/h | 0.0 mm | Very extreme 77 |
| 5 Nov | 26.9 °C | 22 % | 50 km/h | 0.2 mm | Extreme 58 |
| 6 Nov after | 17.7 °C | 46 % | 52 km/h | 30.8 mm | Very low 4 |
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 8 November 2025 the air beside the fire reached 10 µg/m³ of PM2.5, but no daily average passed the WHO 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 · 43Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 6,731 haChalileo25 November 2025 · 1 day · 10 km away
- 6,369 haChalileo25 November 2025 · 3 days · 14 km away
- 17,990 haChalileo30 December 2016 · 6 days · 21 km away
- 11,797 haChalileo27 December 2025 · 3 days · 29 km away
- 7,866 haChalileo21 December 2016 · 2 days · 29 km away
- 7,578 haChalileo10 January 2018 · 1 day · 34 km away
Frequently asked questions
- How long did the Chalileo fire last?
- GWIS (Copernicus) dates it between 4 November 2025 and 5 November 2025: 2 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,667 hectares (26.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Chalileo (2,670 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 28.1 °C, humidity dropped to 17 % and gusts hit 63 km/h. The fire danger index (FWI) reached 77, class Very extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Argentina (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: 911 · 100
Satellite cross-check
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: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 43 Suomi-NPP VIIRS detections 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.
Where this data comes from
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. 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 ADM2 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.