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Juruena fire, July 2021 Juruena, Aripuanã

Out · last detection 7 Aug 2021, 17:47 UTC

The fire started on 25 July 2021 in Juruena, Brazil, and satellites saw it burning for 14 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,871 hectares from heat detections, spread across 2 municipalities.

It is the 1473th largest in Mato Grosso since 2016 (of 1996 with a page). Number 573 in Brazil in 2021, of 814.

Burnt area
3,871ha
GWIS perimeter (Copernicus)
Duration
14days
25 Jul 2021 – 7 Aug 2021
Municipalities hit
2
municipalities
Started on
25 Jul
2021
Heat detections
178
in a single hotspot: 189 MW
Danger at start
41
Very high · FWI index
Energy released
2.5GW
sum of detected power

Where it burned

7 Aug 2021
HOTSPOTS BY DAY 25 Jul7 Aug

How it evolved, day by day

2527282930311234567

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
49km/h · peak gust
22%lowest humidity

It had gone 26 days without rain (1 mm or more) when it started.

This area had burned before

24% of the perimeter overlaps earlier fires recorded since 2016: 935 ha in 2018.

What happened to each town

  1. Juruena 10,213 inhabitants where it started
    2,559 ha reached on 24 Jul
    0.9 %
  2. Aripuanã 25,766 inhabitants
    1,338 ha reached on 1 Aug
    0.0 %

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)
24 Jul 34.0 °C 28 % 37 km/h 0.0 mm Very high 41
25 Jul 33.8 °C 30 % 35 km/h 0.0 mm Very high 38
26 Jul 34.4 °C 30 % 37 km/h 0.0 mm Very high 40
27 Jul 35.5 °C 27 % 31 km/h 0.0 mm Very high 38
28 Jul 31.7 °C 37 % 38 km/h 0.0 mm Very high 38
29 Jul 26.6 °C 30 % 49 km/h 0.0 mm Very high 42
30 Jul 29.5 °C 25 % 35 km/h 0.0 mm High 36
31 Jul 32.3 °C 26 % 32 km/h 0.0 mm High 35
1 Aug 34.6 °C 23 % 40 km/h 0.0 mm Very high 40
2 Aug 33.8 °C 27 % 40 km/h 0.0 mm Very high 42
3 Aug 34.0 °C 26 % 40 km/h 0.0 mm Very high 41
4 Aug 34.0 °C 25 % 41 km/h 0.0 mm Very high 41
5 Aug 33.9 °C 25 % 36 km/h 0.0 mm Very high 39
6 Aug 34.6 °C 22 % 35 km/h 0.0 mm Very high 39
7 Aug 34.2 °C 24 % 38 km/h 0.0 mm Very high 42
8 Aug after 34.6 °C 24 % 38 km/h 0.0 mm Very high 41
9 Aug after 35.0 °C 26 % 32 km/h 0.0 mm Very high 38
10 Aug after 35.9 °C 23 % 35 km/h 0.0 mm Very high 40
11 Aug after 35.6 °C 23 % 31 km/h 0.0 mm Very high 40
12 Aug after 34.2 °C 27 % 37 km/h 0.0 mm Very high 43
13 Aug after 35.3 °C 23 % 32 km/h 0.0 mm Very high 41
14 Aug after 33.3 °C 27 % 28 km/h 0.0 mm Very high 42
15 Aug after 33.1 °C 35 % 28 km/h 0.0 mm High 34
16 Aug after 34.7 °C 29 % 23 km/h 0.0 mm High 32
17 Aug after 35.4 °C 22 % 30 km/h 0.0 mm Very high 38
18 Aug after 35.2 °C 21 % 37 km/h 0.0 mm Very high 44
19 Aug after 35.7 °C 18 % 37 km/h 0.0 mm Very high 44
20 Aug after 35.2 °C 22 % 35 km/h 0.0 mm Very high 43
21 Aug after 35.4 °C 23 % 36 km/h 0.0 mm Very high 44
22 Aug after 35.9 °C 23 % 37 km/h 0.0 mm Very high 46
23 Aug after 35.4 °C 24 % 30 km/h 0.0 mm Very high 42
24 Aug after 36.2 °C 25 % 31 km/h 0.0 mm Very high 43

Before and after, from space

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

Before · 18 Jul 2021
After · 14 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 · 178Every 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 Juruena fire last?
GWIS (Copernicus) dates it between 25 July 2021 and 7 August 2021: 14 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 3,871 hectares (38.7 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Juruena (2,559 ha, 0.9 %); Aripuanã (1,338 ha, 0.0 %).
What was the weather like?
During the fire the temperature reached 35.9 °C, humidity dropped to 22 % and gusts hit 49 km/h. The fire danger index (FWI) reached 43, class Very 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
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.