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Mateiros fire, August 2025 Mateiros

Out · last detection 9 Sept 2025, 15:55 UTC

The fire started on 23 August 2025 in Mateiros, Brazil, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,311 hectares from heat detections, spread across a single municipality.

It is the 424th largest in Tocantins since 2016 (of 1242 with a page). Number 242 in Brazil in 2025, of 714.

Burnt area
6,311ha
GWIS perimeter (Copernicus)
Duration
17days
23 Aug 2025 – 8 Sept 2025
Municipalities hit
1
municipalities
Started on
23 Aug
2025
Heat detections
243
in a single hotspot: 81 MW
Danger at start
58
Extreme · FWI index
Energy released
2.2GW
sum of detected power

Where it burned

9 Sept 2025
HOTSPOTS BY DAY 23 Aug8 Sept

How it evolved, day by day

2425262728293031123456789

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

The weather it burned in

34°high
56km/h · peak gust
17%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started.

This area had burned before

36% of the perimeter overlaps earlier fires recorded since 2016: 1,121 ha in 2017, 589 ha in 2019, 84 ha in 2021, 523 ha in 2022, 264 ha in 2023, 138 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 2,241 ha that had burned before.

What happened to each town

  1. Mateiros 2,748 inhabitants where it started
    6,352 ha reached on 24 Aug
    0.6 %

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)
23 Aug 32.8 °C 20 % 52 km/h 0.0 mm Extreme 58
24 Aug 32.5 °C 19 % 46 km/h 0.0 mm Extreme 56
25 Aug 33.1 °C 19 % 47 km/h 0.0 mm Extreme 56
26 Aug 33.3 °C 23 % 50 km/h 0.0 mm Extreme 59
27 Aug 33.6 °C 20 % 48 km/h 0.0 mm Extreme 55
28 Aug 33.8 °C 20 % 45 km/h 0.0 mm Extreme 56
29 Aug 33.6 °C 19 % 45 km/h 0.0 mm Extreme 55
30 Aug 33.7 °C 19 % 49 km/h 0.0 mm Extreme 58
31 Aug 34.3 °C 17 % 49 km/h 0.0 mm Extreme 57
1 Sept 32.7 °C 23 % 55 km/h 0.0 mm Extreme 61
2 Sept 32.2 °C 25 % 55 km/h 0.0 mm Extreme 59
3 Sept 32.8 °C 23 % 56 km/h 0.0 mm Extreme 60
4 Sept 32.8 °C 24 % 56 km/h 0.0 mm Extreme 60
5 Sept 32.5 °C 24 % 48 km/h 0.0 mm Extreme 55
6 Sept 33.9 °C 19 % 41 km/h 0.0 mm Very high 50
7 Sept 34.4 °C 20 % 43 km/h 0.0 mm Extreme 52
8 Sept 33.8 °C 21 % 48 km/h 0.0 mm Extreme 55
9 Sept after 34.4 °C 19 % 44 km/h 0.0 mm Extreme 54
10 Sept after 37.4 °C 9 % 37 km/h 0.0 mm Extreme 59
11 Sept after 37.1 °C 13 % 42 km/h 0.0 mm Extreme 62
12 Sept after 36.1 °C 15 % 41 km/h 0.0 mm Extreme 62
13 Sept after 34.0 °C 19 % 38 km/h 0.0 mm Extreme 54
14 Sept after 35.7 °C 18 % 38 km/h 0.0 mm Extreme 54
15 Sept after 35.0 °C 16 % 49 km/h 0.0 mm Extreme 63
16 Sept after 34.8 °C 20 % 49 km/h 0.0 mm Extreme 62
17 Sept after 35.8 °C 15 % 44 km/h 0.0 mm Extreme 59
18 Sept after 36.0 °C 17 % 41 km/h 0.0 mm Extreme 58
19 Sept after 32.5 °C 28 % 34 km/h 0.0 mm Very high 46

Before and after, from space

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

Before · 16 Aug 2025
After · 15 Sept 2025

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 17 September 2025 the air beside the fire reached 35 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak35 µg/m³
Days over the guideline0 days
PM1036 µg/m³
Optical depth0.48
21222324252627282930311234567891011121314151617
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 · 243Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Brazil ›

Frequently asked questions

How long did the Mateiros fire last?
GWIS (Copernicus) dates it between 23 August 2025 and 8 September 2025: 17 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 6,311 hectares (63.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Mateiros (6,352 ha, 0.6 %).
What was the weather like?
During the fire the temperature reached 34.4 °C, humidity dropped to 17 % and gusts hit 56 km/h. The fire danger index (FWI) reached 61, class Extreme.
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
What do you think is wrong?

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.