Cujubim fire, August 2018 Cujubim
The fire started on 26 August 2018 in Cujubim, Brazil, and satellites saw it burning for 21 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,678 hectares from heat detections, spread across a single municipality.
It is the 75th largest in Rondônia since 2016 (of 300 with a page). Number 58 in Brazil in 2018, of 291.
Compare with…
- Burnt area
- 6,678ha
- GWIS perimeter (Copernicus)
- Duration
- 21days
- 26 Aug 2018 – 15 Sept 2018
- Municipalities hit
- 1
- municipalities
- Started on
- 26 Aug
- 2018
- Heat detections
- 393
- in a single hotspot: 336 MW
- Danger at start
- 8
- Low · FWI index
- Average daily power
- 427MW
- 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: 9.2 mm on 16 Sept.
This area had burned before
96% of the perimeter overlaps earlier fires recorded since 2016: 6,252 ha in 2016, 7,012 ha in 2017. Part of it burned more than once, so the yearly figures add up to more than the 6,393 ha that had burned before.
- 2,621 ha Cujubim fire, August 2016 3,348 ha in total; the hectares shown are those it shares with this fire
- 1,664 ha Cujubim fire, August 2017 3,648 ha in total; the hectares shown are those it shares with this fire
- 708 ha Cujubim fire, August 2016 6,177 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
-
6,721 ha reached on 26 Aug1.7 %
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.
People and buildings inside the perimeter
GHSL 2020Inside the perimeter there were about 2.9 hectares of built-up land and about 40 residents (GHSL 2020, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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 Aug | 30.2 °C | 50 % | 45 km/h | 0.0 mm | Low 8 |
| 27 Aug | 33.2 °C | 39 % | 29 km/h | 0.0 mm | Moderate 13 |
| 28 Aug | 34.2 °C | 41 % | 21 km/h | 0.1 mm | Moderate 15 |
| 29 Aug | 35.1 °C | 44 % | 27 km/h | 0.2 mm | Moderate 14 |
| 30 Aug | 34.3 °C | 43 % | 27 km/h | 0.0 mm | Moderate 14 |
| 31 Aug | 35.2 °C | 40 % | 29 km/h | 0.3 mm | Moderate 15 |
| 1 Sept | 34.5 °C | 45 % | 27 km/h | 3.4 mm | Very low 4 |
| 2 Sept | 34.0 °C | 48 % | 24 km/h | 0.7 mm | Low 10 |
| 3 Sept | 32.5 °C | 39 % | 38 km/h | 0.0 mm | Moderate 17 |
| 4 Sept | 32.8 °C | 25 % | 39 km/h | 0.0 mm | High 24 |
| 5 Sept | 34.1 °C | 26 % | 30 km/h | 0.0 mm | High 24 |
| 6 Sept | 35.1 °C | 26 % | 24 km/h | 0.0 mm | High 24 |
| 7 Sept | 36.4 °C | 26 % | 21 km/h | 0.0 mm | High 25 |
| 8 Sept | 36.4 °C | 30 % | 22 km/h | 0.0 mm | High 25 |
| 9 Sept | 36.2 °C | 31 % | 32 km/h | 0.0 mm | High 30 |
| 10 Sept | 34.3 °C | 42 % | 22 km/h | 1.3 mm | Moderate 15 |
| 11 Sept | 36.9 °C | 36 % | 24 km/h | 0.0 mm | High 23 |
| 12 Sept | 36.7 °C | 33 % | 23 km/h | 0.3 mm | High 25 |
| 13 Sept | 35.5 °C | 37 % | 33 km/h | 0.6 mm | High 23 |
| 14 Sept | 29.8 °C | 68 % | 28 km/h | 19.9 mm | Very low 0 |
| 15 Sept | 31.9 °C | 57 % | 27 km/h | 6.7 mm | Very low 1 |
| 16 Sept after | 27.5 °C | 77 % | 27 km/h | 9.2 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.
Detections table · 393Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 15,795 haCujubim30 July 2019 · 27 days · 1 km away
- 7,555 haCujubim12 August 2021 · 17 days · 5 km away
- 6,459 haMachadinho D'OesteAugust 2019 · 14 days · 19 km away
- 9,081 haMachadinho D'Oeste2 September 2018 · 14 days · 22 km away
- 13,588 haMachadinho D'OesteAugust 2017 · 22 days · 23 km away
- 16,758 haCujubim29 July 2019 · 27 days · 29 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 26 August 2018 to 15 September 2018 (21 days). The perimeter dates it from 1 September 2018 to 13 September 2018.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 6,678 hectares (66.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Cujubim (6,721 ha, 1.7 %).
- What was the weather like?
- During the fire the temperature reached 36.9 °C, humidity dropped to 25 % and gusts hit 45 km/h. The fire danger index (FWI) reached 30, 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 · 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 adjusted with the VIIRS detections inside the perimeter, which said 1 September 2018 to 13 September 2018. 393 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.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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.