Apuí fire, 5 August 2023 Apuí
The fire started on 5 August 2023 in Apuí, Brazil, and satellites saw it burning for 9 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,021 hectares from heat detections, spread across a single municipality.
It is the 441th largest in Amazonas since 2016 (of 450 with a page). Number 426 in Brazil in 2023, of 431.
- Burnt area
- 3,021ha
- GWIS perimeter (Copernicus)
- Duration
- 9days
- 5 Aug 2023 – 13 Aug 2023
- Municipalities hit
- 1
- municipalities
- Started on
- 5 Aug
- 2023
- Heat detections
- 220
- in a single hotspot: 229 MW
- Danger at start
- 29
- High · FWI index
- Energy released
- 2.1GW
- 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 2 days without rain (1 mm or more) when it started. Rain came after the fire: 5.1 mm on 30 Aug.
This area had burned before
100% of the perimeter overlaps earlier fires recorded since 2016: 1,124 ha in 2017, 63 ha in 2018, 1,226 ha in 2019, 1,467 ha in 2020, 3,839 ha in 2021, 2,421 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 3,039 ha that had burned before.
- 2,252 ha Apuí fire, August 2021 3,922 ha in total; the hectares shown are those it shares with this fire
- 1,415 ha Apuí fire, July 2020 8,401 ha in total; the hectares shown are those it shares with this fire
- 1,357 ha Apuí fire, August 2022 10,040 ha in total; the hectares shown are those it shares with this fire
- 681 ha Apuí fire, August 2017 3,889 ha in total; the hectares shown are those it shares with this fire
- 8 ha Apuí fire, July 2019 4,459 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
3,036 ha reached on 5 Aug0.1 %
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) |
|---|---|---|---|---|---|
| 5 Aug | 36.0 °C | 34 % | 23 km/h | 0.0 mm | High 29 |
| 6 Aug | 36.5 °C | 32 % | 26 km/h | 0.0 mm | High 31 |
| 7 Aug | 35.6 °C | 38 % | 27 km/h | 0.0 mm | High 32 |
| 8 Aug | 35.8 °C | 41 % | 21 km/h | 0.1 mm | High 28 |
| 9 Aug | 36.3 °C | 33 % | 28 km/h | 0.0 mm | High 30 |
| 10 Aug | 34.5 °C | 47 % | 26 km/h | 0.5 mm | High 26 |
| 11 Aug | 34.5 °C | 47 % | 30 km/h | 1.4 mm | Moderate 16 |
| 12 Aug | 35.7 °C | 40 % | 24 km/h | 0.1 mm | High 24 |
| 13 Aug | 31.5 °C | 53 % | 24 km/h | 7.7 mm | Very low 4 |
| 14 Aug after | 33.6 °C | 44 % | 20 km/h | 0.1 mm | Moderate 14 |
| 15 Aug after | 34.8 °C | 37 % | 17 km/h | 0.0 mm | High 23 |
| 16 Aug after | 34.6 °C | 32 % | 24 km/h | 0.0 mm | High 27 |
| 17 Aug after | 34.2 °C | 40 % | 23 km/h | 0.0 mm | High 27 |
| 18 Aug after | 35.3 °C | 36 % | 22 km/h | 0.0 mm | High 26 |
| 19 Aug after | 35.8 °C | 37 % | 27 km/h | 0.0 mm | High 29 |
| 20 Aug after | 36.7 °C | 35 % | 32 km/h | 0.0 mm | High 31 |
| 21 Aug after | 36.9 °C | 33 % | 27 km/h | 0.0 mm | High 29 |
| 22 Aug after | 36.0 °C | 38 % | 25 km/h | 0.0 mm | High 28 |
| 23 Aug after | 36.3 °C | 44 % | 27 km/h | 0.3 mm | High 27 |
| 24 Aug after | 35.3 °C | 44 % | 30 km/h | 0.0 mm | High 29 |
| 25 Aug after | 36.2 °C | 34 % | 25 km/h | 0.0 mm | High 28 |
| 26 Aug after | 32.0 °C | 56 % | 20 km/h | 0.3 mm | High 22 |
| 27 Aug after | 36.4 °C | 36 % | 23 km/h | 0.0 mm | High 27 |
| 28 Aug after | 35.9 °C | 39 % | 27 km/h | 0.0 mm | High 27 |
| 29 Aug after | 36.6 °C | 33 % | 26 km/h | 0.0 mm | High 29 |
| 30 Aug after | 36.3 °C | 41 % | 24 km/h | 5.1 mm | Low 7 |
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 8 August 2023 the air beside the fire reached 95 µg/m³ of PM2.5. That day averaged 66: 4.4 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 · 220Every 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 Apuí fire last?
- GWIS (Copernicus) dates it between 5 August 2023 and 13 August 2023: 9 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 3,021 hectares (30.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Apuí (3,036 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 36.7 °C, humidity dropped to 32 % and gusts hit 32 km/h. The fire danger index (FWI) reached 32, 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
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.