Caleu Caleu fire, 26 December 2025 Caleu Caleu, Hucal
The fire started on 26 December 2025 in Caleu Caleu, Argentina, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 16,852 hectares from heat detections, spread across 2 municipalities.
It is the 14th largest in La Pampa since 2016 (of 190 with a page). Number 2 in Argentina in 2025, of 206.
Compare with…
- Burnt area
- 16,852ha
- GWIS perimeter (Copernicus)
- Duration
- 6days
- 26 Dec 2025 – 31 Dec 2025
- Municipalities hit
- 2
- departments
- Started on
- 26 Dec
- 2025
- Heat detections
- 475
- in a single hotspot: 342 MW
- Danger at start
- 46
- Very high · FWI index
- Average daily power
- 2.8GW
- 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 4 days without rain (1 mm or more) when it started. Rain came after the fire: 4.9 mm on 6 Jan.
This area had burned before
6% of the perimeter overlaps earlier fires recorded since 2016: 1,009 ha in 2017.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Caleu Caleu where it started15,824 ha reached on 26 Dec1.7 %
-
955 ha reached on 29 Dec0.2 %
Burnt area inside each municipality, from crossing the GWIS 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.
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) |
|---|---|---|---|---|---|
| 26 Dec | 36.6 °C | 12 % | 72 km/h | 0.7 mm | Very high 46 |
| 27 Dec | 31.0 °C | 19 % | 38 km/h | 0.0 mm | High 32 |
| 28 Dec | 34.1 °C | 19 % | 30 km/h | 0.0 mm | High 30 |
| 29 Dec | 38.7 °C | 16 % | 42 km/h | 0.6 mm | High 34 |
| 30 Dec | 37.4 °C | 13 % | 33 km/h | 0.0 mm | High 33 |
| 31 Dec | 34.2 °C | 23 % | 52 km/h | 0.0 mm | Very high 43 |
| 1 Jan after | 33.8 °C | 24 % | 63 km/h | 0.0 mm | Very high 50 |
| 2 Jan after | 30.9 °C | 15 % | 60 km/h | 0.0 mm | Very high 48 |
| 3 Jan after | 24.9 °C | 30 % | 41 km/h | 0.0 mm | High 30 |
| 4 Jan after | 30.2 °C | 26 % | 24 km/h | 0.0 mm | High 26 |
| 5 Jan after | 33.9 °C | 21 % | 45 km/h | 0.0 mm | High 37 |
| 6 Jan after | 29.8 °C | 40 % | 46 km/h | 4.9 mm | Low 8 |
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 1 January 2026 the air beside the fire reached 32 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 · 475Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 8,511 haCaleu Caleu27 December 2025 · 4 days · 22 km away
- 3,650 haCaleu Caleu18 December 2016 · 3 days · 24 km away
- 17,780 haCaleu Caleu7 February 2019 · 5 days · 32 km away
- 10,984 haCaleu Caleu22 January 2019 · 5 days · 33 km away
- 10,929 haCaleu Caleu24 January 2017 · 7 days · 33 km away
- 47,322 haCaleu Caleu31 December 2016 · 7 days · 36 km away
Frequently asked questions
- How long did the Caleu Caleu fire last?
- GWIS (Copernicus) dates it between 26 December 2025 and 31 December 2025: 6 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 16,852 hectares (168.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Caleu Caleu (15,824 ha, 1.7 %); Hucal (955 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 38.7 °C, humidity dropped to 12 % and gusts hit 72 km/h. The fire danger index (FWI) reached 46, class Very high.
- 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 · 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: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 475 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.