Cujubim fire, August 2026 Cujubim, Machadinho D'Oeste
The fire started on 27 August 2026 in Cujubim, Brazil, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,782 hectares from heat detections, spread across 2 municipalities.
It is the 131th largest in Rondônia since 2016 (of 300 with a page). Number 372 in Brazil in 2026, of 749.
Compare with…
- Burnt area
- 4,782ha
- GWIS perimeter (Copernicus)
- Duration
- 18days
- 27 Aug 2026 – 13 Sept 2026
- Municipalities hit
- 2
- municipalities
- Started on
- 27 Aug
- 2026
- Heat detections
- 233
- in a single hotspot: 42 MW
- Danger at start
- 26
- High · FWI index
- Average daily power
- 130MW
- 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 15 days without rain (1 mm or more) when it started. Rain came after the fire: 1.5 mm on 17 Sept.
This area had burned before
97% of the perimeter overlaps earlier fires recorded since 2016: 72 ha in 2016, 1,031 ha in 2017, 695 ha in 2018, 3,356 ha in 2019, 2,801 ha in 2020, 2,787 ha in 2021, 6,385 ha in 2022, 3,865 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 4,660 ha that had burned before.
- 2,417 ha Cujubim fire, July 2019 16,758 ha in total; the hectares shown are those it shares with this fire
- 2,024 ha Cujubim fire, August 2022 3,549 ha in total; the hectares shown are those it shares with this fire
- 982 ha Porto Velho fire, July 2024 100,993 ha in total; the hectares shown are those it shares with this fire
- 389 ha Porto Velho fire, July 2021 59,677 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
-
4,562 ha reached on 27 Aug1.2 %
-
Machadinho D'Oeste 30,707 inhabitants247 ha reached on 30 Aug0.0 %
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) |
|---|---|---|---|---|---|
| 27 Aug | 35.6 °C | 43 % | 26 km/h | 0.0 mm | High 26 |
| 28 Aug | 34.7 °C | 49 % | 33 km/h | 0.0 mm | High 25 |
| 29 Aug | 36.0 °C | 42 % | 20 km/h | 0.0 mm | High 24 |
| 30 Aug | 36.2 °C | 39 % | 22 km/h | 0.0 mm | High 25 |
| 31 Aug | 36.2 °C | 40 % | 22 km/h | 0.0 mm | High 26 |
| 1 Sept | 37.0 °C | 35 % | 11 km/h | 0.0 mm | High 25 |
| 2 Sept | 35.4 °C | 50 % | 17 km/h | 2.7 mm | Low 8 |
| 3 Sept | 36.0 °C | 41 % | 18 km/h | 0.0 mm | Moderate 19 |
| 4 Sept | 35.3 °C | 44 % | 22 km/h | 0.5 mm | High 21 |
| 5 Sept | 34.5 °C | 50 % | 21 km/h | 0.1 mm | Moderate 21 |
| 6 Sept | 33.5 °C | 56 % | 24 km/h | 3.1 mm | Low 7 |
| 7 Sept | 29.5 °C | 69 % | 27 km/h | 6.3 mm | Very low 1 |
| 8 Sept | 34.3 °C | 47 % | 19 km/h | 0.0 mm | Low 7 |
| 9 Sept | 34.7 °C | 48 % | 17 km/h | 0.0 mm | Moderate 13 |
| 10 Sept | 34.8 °C | 47 % | 19 km/h | 0.0 mm | Moderate 16 |
| 11 Sept | 34.4 °C | 53 % | 22 km/h | 8.0 mm | Very low 2 |
| 12 Sept | 34.3 °C | 52 % | 27 km/h | 3.9 mm | Very low 2 |
| 13 Sept | 34.5 °C | 51 % | 31 km/h | 2.0 mm | Very low 4 |
| 14 Sept after | 32.3 °C | 51 % | 29 km/h | 0.0 mm | Low 10 |
| 15 Sept after | 35.5 °C | 43 % | 24 km/h | 0.5 mm | Moderate 13 |
| 16 Sept after | 36.3 °C | 40 % | 29 km/h | 0.3 mm | Moderate 17 |
| 17 Sept after | 34.7 °C | 49 % | 22 km/h | 1.5 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 3 September 2026 the air beside the fire reached 78 µg/m³ of PM2.5. That day averaged 53: 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 · 233Every 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 · 9 km away
- 12,970 haCujubim21 August 2022 · 22 days · 19 km away
- 100,993 haPorto Velho7 July 2024 · 70 days · 24 km away
- 16,173 haCujubim24 August 2022 · 30 days · 25 km away
- 15,795 haCujubim30 July 2019 · 20 days · 27 km away
- 13,588 haMachadinho D'OesteAugust 2017 · 20 days · 32 km away
Frequently asked questions
- How long did the Cujubim fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 27 August 2026 to 13 September 2026 (18 days). The perimeter dates it from 27 August 2026 to 8 September 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,782 hectares (47.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Cujubim (4,562 ha, 1.2 %); Machadinho D'Oeste (247 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 37.0 °C, humidity dropped to 35 % and gusts hit 33 km/h. The fire danger index (FWI) reached 26, class 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 adjusted with the VIIRS detections inside the perimeter, which said 27 August 2026 to 8 September 2026. 233 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.