How long did the Apuí fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 10 August 2026 to 3 September 2026 (25 days). The perimeter dates it from 10 August 2026 to 2 September 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,342 hectares (43.4 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Apuí (4,361 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 38.4 °C, humidity dropped to 23 % and gusts hit 34 km/h. The fire danger index (FWI) reached 29, 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.

BR · Brazil · 2026-08-10 → 2026-09-03

Apuí fire, 10 August 2026 Apuí

Out · last detection 3 Sept 2026, 17:15 UTC

The fire started on 10 August 2026 in Apuí, Brazil, and satellites saw it burning for 25 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,342 hectares from heat detections, spread across a single municipality.

It is the 214th largest in Amazonas since 2016 (of 450 with a page). Number 432 in Brazil in 2026, of 747.

Burnt area: 4,342ha; GWIS perimeter (Copernicus)
Duration: 25days; 10 Aug 2026 – 3 Sept 2026
Municipalities hit: 1; municipalities
Started on: 10 Aug; 2026
Heat detections: 179; in a single hotspot: 52 MW
Danger at start: 6; Low · FWI index
Energy released: 1.2GW; sum of detected power

Play back 3 Sept 2026

HOTSPOTS BY DAY 10 Aug3 Sept

How it evolved, day by day

10111314151617181920212223252628293123

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

38°high

34km/h · peak gust

23%lowest humidity

It had gone 14 days without rain (1 mm or more) when it started. Rain came after the fire: 5.3 mm on 5 Sept.

This area had burned before

85% of the perimeter overlaps earlier fires recorded since 2016: 1,172 ha in 2021, 84 ha in 2022, 1,862 ha in 2023, 2,535 ha in 2024, 930 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 3,690 ha that had burned before.

What happened to each town

Apuí 20,647 inhabitants where it started

4,361 ha reached on 10 Aug

0.1 %

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)
10 Aug	32.5 °C	58 %	25 km/h	2.3 mm	Low 6
11 Aug	28.6 °C	74 %	24 km/h	3.5 mm	Very low 1
12 Aug	30.8 °C	64 %	26 km/h	4.0 mm	Very low 2
13 Aug	34.0 °C	50 %	19 km/h	0.0 mm	Low 7
14 Aug	36.5 °C	30 %	27 km/h	0.0 mm	High 22
15 Aug	37.0 °C	23 %	28 km/h	0.0 mm	High 28
16 Aug	36.4 °C	34 %	20 km/h	0.0 mm	High 26
17 Aug	35.0 °C	44 %	34 km/h	0.5 mm	High 23
18 Aug	34.2 °C	48 %	32 km/h	0.0 mm	Moderate 19
19 Aug	36.3 °C	37 %	21 km/h	0.0 mm	High 22
20 Aug	36.3 °C	36 %	18 km/h	0.0 mm	High 22
21 Aug	36.7 °C	32 %	25 km/h	0.0 mm	High 26
22 Aug	36.8 °C	33 %	22 km/h	0.0 mm	High 26
23 Aug	31.6 °C	62 %	24 km/h	0.2 mm	Moderate 17
24 Aug	35.8 °C	40 %	19 km/h	0.0 mm	Moderate 21
25 Aug	38.4 °C	25 %	18 km/h	0.0 mm	High 29
26 Aug	36.7 °C	37 %	20 km/h	0.0 mm	High 29
27 Aug	34.3 °C	53 %	20 km/h	1.7 mm	Low 11
28 Aug	36.3 °C	38 %	22 km/h	0.0 mm	High 22
29 Aug	37.2 °C	34 %	21 km/h	0.0 mm	High 27
30 Aug	37.0 °C	36 %	21 km/h	0.0 mm	High 27
31 Aug	36.8 °C	39 %	22 km/h	0.0 mm	High 27
1 Sept	36.5 °C	42 %	17 km/h	0.0 mm	High 26
2 Sept	36.7 °C	39 %	20 km/h	0.0 mm	High 27
3 Sept	33.3 °C	56 %	24 km/h	0.7 mm	Moderate 18
4 Sept after	35.0 °C	48 %	24 km/h	0.1 mm	Moderate 20
5 Sept after	33.8 °C	53 %	25 km/h	5.3 mm	Very low 4

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 3 Aug 2026

After · 10 Sept 2026

Before After

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 · Copernicus

On 23 August 2026 the air beside the fire reached 924 µg/m³ of PM2.5. That day averaged 336: 22 times the WHO daily guideline (15).

PM2.5 peak924 µg/m³

Days over the guideline28 days

PM10935 µg/m³

Optical depth2.77

WHO 15

8910111213141516171819202122232425262728293031123456

Good Fair Moderate Poor Very poor Extremely poor

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 · 179Every satellite heat detection, one by one, with time, satellite, power and coordinates.

⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.

Date and time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in Brazil ›

Frequently asked questions

How long did the Apuí fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 10 August 2026 to 3 September 2026 (25 days). The perimeter dates it from 10 August 2026 to 2 September 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,342 hectares (43.4 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Apuí (4,361 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 38.4 °C, humidity dropped to 23 % and gusts hit 34 km/h. The fire danger index (FWI) reached 29, 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

INPE · Programa Queimadas ↗
IBAMA · Prevfogo ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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.

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We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 193.

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.

Where it burned