Aripuanã fire, 25 August 2021 Aripuanã
The fire started on 25 August 2021 in Aripuanã, Brazil, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,867 hectares from heat detections, spread across a single municipality.
It is the 754th largest in Mato Grosso since 2016 (of 1996 with a page). Number 254 in Brazil in 2021, of 814.
- Burnt area
- 6,867ha
- GWIS perimeter (Copernicus)
- Duration
- 10days
- 25 Aug 2021 – 3 Sept 2021
- Municipalities hit
- 1
- municipalities
- Started on
- 25 Aug
- 2021
- Heat detections
- 413
- in a single hotspot: 464 MW
- Danger at start
- 38
- Very high · FWI index
- Energy released
- 9.0GW
- sum of detected power
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 57 days without rain (1 mm or more) when it started. Rain came after the fire: 13.2 mm on 9 Sept.
This area had burned before
77% of the perimeter overlaps earlier fires recorded since 2016: 402 ha in 2016, 2,616 ha in 2017, 1,544 ha in 2018, 2,136 ha in 2019, 3,770 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 5,288 ha that had burned before.
What happened to each town
-
6,903 ha reached on 25 Aug0.3 %
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) |
|---|---|---|---|---|---|
| 25 Aug | 36.7 °C | 34 % | 37 km/h | 0.0 mm | Very high 38 |
| 26 Aug | 37.5 °C | 34 % | 25 km/h | 0.0 mm | High 36 |
| 27 Aug | 33.3 °C | 37 % | 31 km/h | 0.2 mm | High 33 |
| 28 Aug | 35.2 °C | 39 % | 19 km/h | 0.0 mm | High 30 |
| 29 Aug | 33.9 °C | 44 % | 25 km/h | 0.0 mm | High 30 |
| 30 Aug | 34.5 °C | 40 % | 19 km/h | 0.0 mm | High 30 |
| 31 Aug | 34.8 °C | 36 % | 24 km/h | 0.9 mm | High 25 |
| 1 Sept | 32.1 °C | 48 % | 31 km/h | 0.7 mm | High 23 |
| 2 Sept | 33.1 °C | 45 % | 25 km/h | 0.3 mm | High 24 |
| 3 Sept | 32.4 °C | 49 % | 22 km/h | 0.0 mm | High 22 |
| 4 Sept after | 34.6 °C | 42 % | 28 km/h | 0.8 mm | High 22 |
| 5 Sept after | 34.0 °C | 40 % | 29 km/h | 0.0 mm | High 26 |
| 6 Sept after | 35.0 °C | 44 % | 30 km/h | 0.7 mm | High 23 |
| 7 Sept after | 34.3 °C | 43 % | 24 km/h | 0.0 mm | High 24 |
| 8 Sept after | 34.2 °C | 45 % | 27 km/h | 1.7 mm | Moderate 14 |
| 9 Sept after | 26.8 °C | 68 % | 31 km/h | 13.2 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 · 413Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 7,334 haAripuanã29 August 2020 · 21 days · 16 km away
- 8,873 haAripuanãJuly 2021 · 19 days · 23 km away
- 10,794 haAripuanã11 August 2019 · 8 days · 24 km away
- 5,021 haAripuanã5 August 2020 · 18 days · 27 km away
- 7,364 haAripuanã27 August 2022 · 12 days · 32 km away
- 9,391 haAripuanã27 August 2020 · 18 days · 35 km away
Frequently asked questions
- How long did the Aripuanã fire last?
- GWIS (Copernicus) dates it between 25 August 2021 and 3 September 2021: 10 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 6,867 hectares (68.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Aripuanã (6,903 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 37.5 °C, humidity dropped to 34 % and gusts hit 37 km/h. The fire danger index (FWI) reached 38, 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
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.