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Lábrea fire, 11 August 2021 Lábrea

Out · last detection 24 Aug 2021, 17:29 UTC

The fire started on 11 August 2021 in Lábrea, Brazil, and satellites saw it burning for 14 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,798 hectares from heat detections, spread across a single municipality.

It is the 283th largest in Amazonas since 2016 (of 450 with a page). Number 592 in Brazil in 2021, of 814.

Compare with…

Suggestions: Lábrea · 2024Lábrea · 2024Lábrea · 2019Lábrea · 2021

Burnt area
3,798ha
GWIS perimeter (Copernicus)
Duration
14days
11 Aug 2021 – 24 Aug 2021
Municipalities hit
1
municipalities
Started on
11 Aug
2021
Heat detections
280
in a single hotspot: 114 MW
Danger at start
31
High · FWI index
Average daily power
343MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 11 Aug24 Aug
24 Aug 2021

How it evolved, day by day

11 Aug 2021 · 306 MW · 9 12 Aug 2021 · 790 MW · 30 13 Aug 2021 · 40 MW · 12 14 Aug 2021 · 1,546 MW · 46 15 Aug 2021 · 871 MW · 75 16 Aug 2021 · 86 MW · 45 17 Aug 2021 · 9 MW · 5 20 Aug 2021 · 111 MW · 17 21 Aug 2021 · 33 MW · 17 22 Aug 2021 · 224 MW · 10 23 Aug 2021 · 16 MW · 6 24 Aug 2021 · 80 MW · 8
11 Aug 13 Aug 14 Aug 15 Aug 17 Aug 21 Aug 23 Aug

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

The weather it burned in

36°high
34km/h · peak gust
32%lowest humidity

It had gone 22 days without rain (1 mm or more) when it started. Rain came after the fire: 11.2 mm on 29 Aug.

This area had burned before

5% of the perimeter overlaps earlier fires recorded since 2016: 206 ha in 2020.

How big is it?

10 km
It burned the equivalent of 2.4% of the area of London (38 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Lábrea 45,448 inhabitants where it started
    3,828 ha reached on 11 Aug
    0.1 %

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.

People and buildings inside the perimeter

GHSL 2020
Built-up area< 0.1 ha
Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, satellite-based estimate).

This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.

Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu

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 34.6 °C 37 % 23 km/h 0.0 mm High 31
11 Aug 34.3 °C 37 % 29 km/h 0.2 mm High 33
12 Aug 31.5 °C 39 % 34 km/h 0.0 mm High 33
13 Aug 32.3 °C 35 % 31 km/h 0.0 mm High 32
14 Aug 33.7 °C 34 % 25 km/h 0.0 mm High 31
15 Aug 33.7 °C 37 % 21 km/h 0.0 mm High 29
16 Aug 35.9 °C 33 % 20 km/h 0.0 mm High 30
17 Aug 35.9 °C 33 % 22 km/h 0.0 mm High 31
18 Aug 35.9 °C 40 % 25 km/h 0.1 mm High 31
19 Aug 35.3 °C 36 % 20 km/h 0.0 mm High 31
20 Aug 34.5 °C 42 % 26 km/h 0.0 mm High 30
21 Aug 35.2 °C 43 % 26 km/h 0.0 mm High 30
22 Aug 35.4 °C 43 % 24 km/h 0.2 mm High 29
23 Aug 36.2 °C 36 % 31 km/h 0.0 mm High 30
24 Aug 36.4 °C 32 % 28 km/h 0.0 mm High 32
25 Aug after 37.2 °C 38 % 37 km/h 0.2 mm High 34
26 Aug after 37.8 °C 34 % 31 km/h 0.3 mm High 33
27 Aug after 33.0 °C 44 % 30 km/h 0.1 mm High 32
28 Aug after 33.6 °C 47 % 31 km/h 0.0 mm High 28
29 Aug after 31.4 °C 59 % 28 km/h 11.2 mm Very low 3

Before and after, from space

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

Before · 4 Aug 2021
After · 31 Aug 2021

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 · 280Every 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 Lábrea fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 11 August 2021 to 24 August 2021 (14 days). The perimeter dates it from 11 August 2021 to 17 August 2021.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,798 hectares (38.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Lábrea (3,828 ha, 0.1 %).
What was the weather like?
During the fire the temperature reached 36.4 °C, humidity dropped to 32 % and gusts hit 34 km/h. The fire danger index (FWI) reached 33, 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 · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Last day with fire: 17 August 2021 → 24 August 2021.

RSS Changes to this page

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.

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 11 August 2021 to 17 August 2021. 280 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.
  • Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

How we build fire pages: methodology ›

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.