Chhaeb fire, 28 January 2026 Chhaeb
The fire started on 28 January 2026 in Chhaeb, Cambodia, and satellites saw it burning for 29 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 15,472 hectares from heat detections, spread across a single municipality.
It is the 4th largest in Preah Vihear since 2016 (of 97 with a page). Number 5 in Cambodia in 2026, of 118.
Compare with…
Suggestions: Chhaeb · 2022Chhaeb · 2019Chhaeb · 2024Chhaeb · 2017
- Burnt area
- 15,472ha
- GWIS perimeter (Copernicus)
- Duration
- 29days
- 28 Jan 2026 – 25 Feb 2026
- Municipalities hit
- 1
- districts
- Started on
- 28 Jan
- 2026
- Heat detections
- 502
- in a single hotspot: 91 MW
- Danger at start
- 26
- High · FWI index
- Average daily power
- 155MW
- 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 36 days without rain (1 mm or more) when it started. Rain came after the fire: 16.4 mm on 27 Feb.
This area had burned before
35% of the perimeter overlaps earlier fires recorded since 2016: 926 ha in 2016, 456 ha in 2017, 1,892 ha in 2019, 614 ha in 2020, 1,126 ha in 2021, 1,524 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 5,393 ha that had burned before.
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
-
Chhaeb where it started15,565 ha reached on 28 Jan6.1 %
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) |
|---|---|---|---|---|---|
| 28 Jan | 31.8 °C | 38 % | 24 km/h | 0.0 mm | High 26 |
| 29 Jan | 32.3 °C | 38 % | 26 km/h | 0.0 mm | High 28 |
| 30 Jan | 32.7 °C | 38 % | 22 km/h | 0.0 mm | High 27 |
| 31 Jan | 32.8 °C | 36 % | 22 km/h | 0.0 mm | High 27 |
| 1 Feb | 32.2 °C | 33 % | 28 km/h | 0.0 mm | High 28 |
| 2 Feb | 32.4 °C | 36 % | 33 km/h | 0.0 mm | High 30 |
| 3 Feb | 32.2 °C | 42 % | 30 km/h | 0.0 mm | High 28 |
| 4 Feb | 33.2 °C | 39 % | 23 km/h | 0.0 mm | High 27 |
| 5 Feb | 34.5 °C | 38 % | 20 km/h | 0.0 mm | High 27 |
| 6 Feb | 35.0 °C | 37 % | 19 km/h | 0.0 mm | High 28 |
| 7 Feb | 32.8 °C | 52 % | 26 km/h | 0.5 mm | High 24 |
| 8 Feb | 31.7 °C | 46 % | 30 km/h | 0.0 mm | High 26 |
| 9 Feb | 33.7 °C | 34 % | 33 km/h | 0.0 mm | High 32 |
| 10 Feb | 34.2 °C | 33 % | 26 km/h | 0.0 mm | High 29 |
| 11 Feb | 34.6 °C | 42 % | 31 km/h | 0.0 mm | High 31 |
| 12 Feb | 35.0 °C | 37 % | 20 km/h | 0.0 mm | High 28 |
| 13 Feb | 35.9 °C | 33 % | 27 km/h | 0.0 mm | High 32 |
| 14 Feb | 35.9 °C | 32 % | 26 km/h | 0.0 mm | High 33 |
| 15 Feb | 36.6 °C | 31 % | 24 km/h | 0.0 mm | High 33 |
| 16 Feb | 36.8 °C | 29 % | 30 km/h | 0.0 mm | High 36 |
| 17 Feb | 36.5 °C | 29 % | 37 km/h | 0.0 mm | High 37 |
| 18 Feb | 36.2 °C | 31 % | 34 km/h | 0.0 mm | High 36 |
| 19 Feb | 35.1 °C | 35 % | 30 km/h | 0.0 mm | High 37 |
| 20 Feb | 35.4 °C | 35 % | 28 km/h | 0.0 mm | High 35 |
| 21 Feb | 35.6 °C | 33 % | 23 km/h | 0.0 mm | High 34 |
| 22 Feb | 36.6 °C | 34 % | 20 km/h | 0.0 mm | High 34 |
| 23 Feb | 34.9 °C | 47 % | 29 km/h | 0.1 mm | High 30 |
| 24 Feb | 36.6 °C | 39 % | 23 km/h | 0.0 mm | High 28 |
| 25 Feb | 35.5 °C | 41 % | 27 km/h | 0.0 mm | High 29 |
| 26 Feb after | 35.4 °C | 43 % | 24 km/h | 0.0 mm | High 29 |
| 27 Feb after | 27.4 °C | 70 % | 20 km/h | 16.4 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 15 February 2026 the air beside the fire reached 77 µg/m³ of PM2.5. That day averaged 52: 3.5 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 · 502Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Chhaeb fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 28 January 2026 to 25 February 2026 (29 days). The perimeter dates it from 4 February 2026 to 19 February 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 15,472 hectares (154.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Chhaeb (15,565 ha, 6.1 %).
- What was the weather like?
- During the fire the temperature reached 36.8 °C, humidity dropped to 29 % and gusts hit 37 km/h. The fire danger index (FWI) reached 37, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Cambodia (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.
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; 3 polygons grouped in this page.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 4 February 2026 to 19 February 2026. 502 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 4.0 International (CC BY 4.0)). 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.