Cujubim fire, August 2025 Cujubim
The fire started on 18 August 2025 in Cujubim, Brazil, and satellites saw it burning for 14 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 7,795 hectares from heat detections, spread across a single municipality.
It is the 64th largest in Rondônia since 2016 (of 300 with a page). Number 174 in Brazil in 2025, of 714.
Compare with…
- Burnt area
- 7,795ha
- GWIS perimeter (Copernicus)
- Duration
- 14days
- 18 Aug 2025 – 31 Aug 2025
- Municipalities hit
- 1
- municipalities
- Started on
- 18 Aug
- 2025
- Heat detections
- 759
- in a single hotspot: 250 MW
- Danger at start
- 25
- High · FWI index
- Average daily power
- 796MW
- 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 0 days without rain (1 mm or more) when it started. Rain came after the fire: 10.2 mm on 2 Sept.
This area had burned before
99% of the perimeter overlaps earlier fires recorded since 2016: 320 ha in 2016, 2,872 ha in 2017, 1,398 ha in 2018, 6,201 ha in 2019, 4,442 ha in 2020, 7,028 ha in 2021, 7,482 ha in 2022, 300 ha in 2023, 9,973 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 7,732 ha that had burned before.
- 6,764 ha Porto Velho fire, July 2021 59,677 ha in total; the hectares shown are those it shares with this fire
- 3,891 ha Porto Velho fire, July 2024 100,993 ha in total; the hectares shown are those it shares with this fire
- 3,326 ha Cujubim fire, July 2019 16,758 ha in total; the hectares shown are those it shares with this fire
- 948 ha Cujubim fire, August 2022 12,970 ha in total; the hectares shown are those it shares with this fire
- 245 ha Cujubim fire, August 2019 4,437 ha in total; the hectares shown are those it shares with this fire
- 156 ha Cujubim fire, August 2023 5,550 ha in total; the hectares shown are those it shares with this fire
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
-
7,839 ha reached on 18 Aug2.0 %
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) |
|---|---|---|---|---|---|
| 18 Aug | 35.4 °C | 40 % | 27 km/h | 0.0 mm | High 25 |
| 19 Aug | 34.9 °C | 46 % | 28 km/h | 0.2 mm | High 24 |
| 20 Aug | 33.3 °C | 46 % | 27 km/h | 2.1 mm | Moderate 12 |
| 21 Aug | 37.1 °C | 37 % | 25 km/h | 0.5 mm | High 25 |
| 22 Aug | 36.1 °C | 30 % | 33 km/h | 0.0 mm | High 32 |
| 23 Aug | 36.2 °C | 29 % | 24 km/h | 0.0 mm | High 31 |
| 24 Aug | 37.5 °C | 19 % | 30 km/h | 0.0 mm | Very high 42 |
| 25 Aug | 33.3 °C | 34 % | 35 km/h | 0.0 mm | High 38 |
| 26 Aug | 34.4 °C | 29 % | 38 km/h | 0.0 mm | High 38 |
| 27 Aug | 35.6 °C | 30 % | 32 km/h | 0.0 mm | High 36 |
| 28 Aug | 34.9 °C | 37 % | 20 km/h | 0.0 mm | High 32 |
| 29 Aug | 36.1 °C | 35 % | 23 km/h | 0.0 mm | High 32 |
| 30 Aug | 36.3 °C | 35 % | 24 km/h | 0.0 mm | High 33 |
| 31 Aug | 35.8 °C | 38 % | 26 km/h | 1.9 mm | Moderate 17 |
| 1 Sept after | 36.3 °C | 40 % | 28 km/h | 0.6 mm | High 23 |
| 2 Sept after | 35.1 °C | 43 % | 26 km/h | 10.2 mm | Very low 5 |
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 September 2025 the air beside the fire reached 108 µg/m³ of PM2.5. That day averaged 54: 3.6 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 · 759Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 16,758 haCujubim29 July 2019 · 27 days · 2 km away
- 12,970 haCujubim21 August 2022 · 22 days · 10 km away
- 100,993 haPorto Velho7 July 2024 · 70 days · 18 km away
- 16,173 haCujubim24 August 2022 · 30 days · 20 km away
- 15,795 haCujubim30 July 2019 · 20 days · 30 km away
- 13,588 haMachadinho D'OesteAugust 2017 · 20 days · 39 km away
Frequently asked questions
- How long did the Cujubim fire last?
- GWIS (Copernicus) dates it between 18 August 2025 and 31 August 2025: 14 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 7,795 hectares (78.0 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Cujubim (7,839 ha, 2.0 %).
- What was the weather like?
- During the fire the temperature reached 37.5 °C, humidity dropped to 19 % and gusts hit 38 km/h. The fire danger index (FWI) reached 42, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Brazil (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: 193
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. 759 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.