How long did the Lábrea fire last?

GWIS (Copernicus) dates it between 21 July 2021 and 10 August 2021: 21 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 3,901 hectares (39.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Lábrea (3,935 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 36.3 °C, humidity dropped to 26 % and gusts hit 46 km/h. The fire danger index (FWI) reached 36, 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 · 2021-07-21 → 2021-08-10

Lábrea fire, 21 July 2021 Lábrea

Out · last detection 10 Aug 2021, 18:31 UTC

The fire started on 21 July 2021 in Lábrea, Brazil, and satellites saw it burning for 21 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,901 hectares from heat detections, spread across a single municipality.

It is the 268th largest in Amazonas since 2016 (of 450 with a page). Number 567 in Brazil in 2021, of 814.

Burnt area: 3,901ha; GWIS perimeter (Copernicus)
Duration: 21days; 21 Jul 2021 – 10 Aug 2021
Municipalities hit: 1; municipalities
Started on: 21 Jul; 2021
Heat detections: 220; in a single hotspot: 124 MW
Danger at start: 24; High · FWI index
Average daily power: 170MW; detected power per day, on average

Play back 10 Aug 2021

HOTSPOTS BY DAY 21 Jul10 Aug

How it evolved, day by day

21 Jul 24 Jul 28 Jul 31 Jul 2 Aug 3 Aug 6 Aug 9 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

46km/h · peak gust

26%lowest humidity

It had gone 22 days without rain (1 mm or more) when it started.

This area had burned before

90% of the perimeter overlaps earlier fires recorded since 2016: 2,905 ha in 2018, 3,952 ha in 2019, 2,964 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 3,498 ha that had burned before.

2,964 ha Lábrea fire, August 2020 5,190 ha in total; the hectares shown are those it shares with this fire

What happened to each town

Lábrea 45,448 inhabitants where it started

3,935 ha reached on 21 Jul

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)
21 Jul	32.4 °C	34 %	30 km/h	0.0 mm	High 24
22 Jul	33.9 °C	32 %	31 km/h	0.0 mm	High 26
23 Jul	35.2 °C	31 %	26 km/h	0.0 mm	High 27
24 Jul	35.3 °C	34 %	20 km/h	0.0 mm	High 26
25 Jul	35.1 °C	39 %	33 km/h	0.0 mm	High 27
26 Jul	34.9 °C	40 %	28 km/h	0.4 mm	High 28
27 Jul	35.3 °C	40 %	22 km/h	0.0 mm	High 27
28 Jul	30.5 °C	48 %	41 km/h	0.0 mm	High 29
29 Jul	26.3 °C	27 %	46 km/h	0.0 mm	High 33
30 Jul	28.7 °C	27 %	34 km/h	0.0 mm	High 31
31 Jul	31.4 °C	28 %	27 km/h	0.0 mm	High 30
1 Aug	33.3 °C	31 %	35 km/h	0.0 mm	High 32
2 Aug	33.1 °C	26 %	40 km/h	0.0 mm	High 36
3 Aug	33.7 °C	29 %	34 km/h	0.0 mm	High 35
4 Aug	34.5 °C	30 %	34 km/h	0.0 mm	High 34
5 Aug	35.4 °C	27 %	32 km/h	0.0 mm	High 34
6 Aug	35.1 °C	30 %	27 km/h	0.0 mm	High 33
7 Aug	35.1 °C	31 %	16 km/h	0.0 mm	High 31
8 Aug	36.2 °C	29 %	20 km/h	0.0 mm	High 32
9 Aug	35.9 °C	30 %	19 km/h	0.0 mm	High 34
10 Aug	34.9 °C	35 %	22 km/h	0.0 mm	High 32
11 Aug after	34.3 °C	36 %	31 km/h	0.0 mm	High 35
12 Aug after	32.0 °C	37 %	35 km/h	0.0 mm	High 35
13 Aug after	32.6 °C	34 %	33 km/h	0.0 mm	High 34
14 Aug after	34.1 °C	32 %	27 km/h	0.0 mm	High 33
15 Aug after	34.1 °C	34 %	23 km/h	0.0 mm	High 30
16 Aug after	36.3 °C	32 %	21 km/h	0.0 mm	High 31
17 Aug after	36.2 °C	32 %	23 km/h	0.0 mm	High 32
18 Aug after	35.9 °C	38 %	27 km/h	0.0 mm	High 32
19 Aug after	35.8 °C	33 %	23 km/h	0.0 mm	High 32
20 Aug after	34.4 °C	41 %	26 km/h	0.0 mm	High 31
21 Aug after	35.3 °C	42 %	22 km/h	0.4 mm	High 30
22 Aug after	35.5 °C	43 %	26 km/h	0.0 mm	High 30
23 Aug after	36.4 °C	35 %	33 km/h	0.0 mm	High 30
24 Aug after	36.4 °C	31 %	29 km/h	0.0 mm	High 33
25 Aug after	37.0 °C	38 %	37 km/h	0.3 mm	High 35
26 Aug after	37.8 °C	34 %	32 km/h	0.2 mm	High 35
27 Aug after	33.2 °C	44 %	33 km/h	0.7 mm	High 26

Before and after, from space

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

↔

Before · 14 Jul 2021

After · 17 Aug 2021

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.

Detections table · 220Every 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 Lábrea fire last?: GWIS (Copernicus) dates it between 21 July 2021 and 10 August 2021: 21 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 3,901 hectares (39.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Lábrea (3,935 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 36.3 °C, humidity dropped to 26 % and gusts hit 46 km/h. The fire danger index (FWI) reached 36, 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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What really happened?

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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