Boca do Acre fire, 26 August 2022 Boca do Acre
The fire started on 26 August 2022 in Boca do Acre, Brazil, and satellites saw it burning for 27 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,934 hectares from heat detections, spread across a single municipality.
It is the 263th largest in Amazonas since 2016 (of 450 with a page). Number 427 in Brazil in 2022, of 687.
Compare with…
- Burnt area
- 3,934ha
- GWIS perimeter (Copernicus)
- Duration
- 27days
- 26 Aug 2022 – 21 Sept 2022
- Municipalities hit
- 1
- municipalities
- Started on
- 26 Aug
- 2022
- Heat detections
- 219
- in a single hotspot: 148 MW
- Danger at start
- 21
- Moderate · FWI index
- Average daily power
- 150MW
- 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 6 days without rain (1 mm or more) when it started. Rain came after the fire: 1.6 mm on 22 Sept.
This area had burned before
40% of the perimeter overlaps earlier fires recorded since 2016: 133 ha in 2017, 18 ha in 2018, 508 ha in 2019, 882 ha in 2020, 962 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 1,572 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
-
3,963 ha reached on 26 Aug0.2 %
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) |
|---|---|---|---|---|---|
| 26 Aug | 33.6 °C | 44 % | 20 km/h | 0.0 mm | Moderate 21 |
| 27 Aug | 34.1 °C | 49 % | 21 km/h | 0.1 mm | Moderate 20 |
| 28 Aug | 33.9 °C | 47 % | 28 km/h | 2.6 mm | Low 10 |
| 29 Aug | 28.2 °C | 47 % | 40 km/h | 0.9 mm | Moderate 14 |
| 30 Aug | 31.6 °C | 37 % | 28 km/h | 0.0 mm | Moderate 20 |
| 31 Aug | 33.7 °C | 38 % | 19 km/h | 0.0 mm | Moderate 21 |
| 1 Sept | 35.3 °C | 39 % | 26 km/h | 0.0 mm | Moderate 21 |
| 2 Sept | 36.3 °C | 33 % | 20 km/h | 0.0 mm | High 24 |
| 3 Sept | 34.0 °C | 37 % | 32 km/h | 0.0 mm | High 27 |
| 4 Sept | 32.4 °C | 35 % | 38 km/h | 0.0 mm | High 30 |
| 5 Sept | 32.8 °C | 32 % | 32 km/h | 0.0 mm | High 28 |
| 6 Sept | 34.3 °C | 27 % | 31 km/h | 0.0 mm | High 31 |
| 7 Sept | 35.0 °C | 34 % | 21 km/h | 0.0 mm | High 29 |
| 8 Sept | 35.4 °C | 41 % | 31 km/h | 0.0 mm | High 29 |
| 9 Sept | 35.8 °C | 43 % | 25 km/h | 1.1 mm | Moderate 20 |
| 10 Sept | 35.8 °C | 45 % | 25 km/h | 1.8 mm | Moderate 12 |
| 11 Sept | 28.1 °C | 68 % | 20 km/h | 14.6 mm | Very low 0 |
| 12 Sept | 33.3 °C | 50 % | 19 km/h | 0.3 mm | Low 5 |
| 13 Sept | 35.7 °C | 41 % | 26 km/h | 0.0 mm | Moderate 16 |
| 14 Sept | 34.9 °C | 46 % | 28 km/h | 4.3 mm | Low 6 |
| 15 Sept | 24.6 °C | 60 % | 49 km/h | 6.5 mm | Very low 1 |
| 16 Sept | 31.7 °C | 41 % | 29 km/h | 0.4 mm | Low 6 |
| 17 Sept | 35.1 °C | 39 % | 17 km/h | 0.1 mm | Moderate 13 |
| 18 Sept | 35.3 °C | 43 % | 28 km/h | 0.0 mm | Moderate 15 |
| 19 Sept | 36.0 °C | 42 % | 27 km/h | 0.2 mm | Moderate 15 |
| 20 Sept | 35.3 °C | 43 % | 24 km/h | 4.3 mm | Very low 4 |
| 21 Sept | 36.3 °C | 40 % | 29 km/h | 0.0 mm | Moderate 13 |
| 22 Sept after | 35.0 °C | 43 % | 27 km/h | 1.6 mm | Low 9 |
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 7 September 2022 the air beside the fire reached 383 µg/m³ of PM2.5. That day averaged 256: 17 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 · 219Every 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 Boca do Acre fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 26 August 2022 to 21 September 2022 (27 days). The perimeter dates it from 2 September 2022 to 14 September 2022.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,934 hectares (39.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Boca do Acre (3,963 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 36.3 °C, humidity dropped to 27 % and gusts hit 49 km/h. The fire danger index (FWI) reached 31, 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 14 September 2022 → 21 September 2022.
- Start date: 2 September 2022 → 26 August 2022.
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 2 September 2022 to 14 September 2022. 219 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.