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Juara fire, 16 August 2021 Juara

Out · last detection 1 Sept 2021, 05:43 UTC

The fire started on 16 August 2021 in Juara, Brazil, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,910 hectares from heat detections, spread across a single municipality.

It is the 336th largest in Mato Grosso since 2016 (of 1996 with a page). Number 110 in Brazil in 2021, of 814.

Burnt area
12,910ha
GWIS perimeter (Copernicus)
Duration
17days
16 Aug 2021 – 1 Sept 2021
Municipalities hit
1
municipalities
Started on
16 Aug
2021
Heat detections
535
in a single hotspot: 243 MW
Danger at start
40
Very high · FWI index
Energy released
10.9GW
sum of detected power

Where it burned

1 Sept 2021
HOTSPOTS BY DAY 16 Aug1 Sept

How it evolved, day by day

161718192021222324252627282930311

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
41km/h · peak gust
17%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started. Rain came after the fire: 1.4 mm on 7 Sept.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

  1. Juara 34,906 inhabitants where it started
    12,976 ha reached on 16 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)
16 Aug 35.2 °C 21 % 29 km/h 0.0 mm Very high 40
17 Aug 35.1 °C 19 % 32 km/h 0.0 mm Very high 43
18 Aug 35.2 °C 17 % 36 km/h 0.0 mm Very high 49
19 Aug 34.9 °C 19 % 41 km/h 0.0 mm Very high 49
20 Aug 34.4 °C 23 % 38 km/h 0.0 mm Very high 47
21 Aug 35.0 °C 22 % 37 km/h 0.0 mm Very high 47
22 Aug 35.4 °C 23 % 35 km/h 0.0 mm Very high 47
23 Aug 34.9 °C 25 % 28 km/h 0.0 mm Very high 43
24 Aug 35.2 °C 26 % 32 km/h 0.0 mm Very high 42
25 Aug 36.2 °C 26 % 33 km/h 0.0 mm Very high 43
26 Aug 35.6 °C 31 % 20 km/h 0.0 mm High 35
27 Aug 34.7 °C 33 % 26 km/h 0.0 mm High 38
28 Aug 35.0 °C 32 % 29 km/h 0.0 mm High 34
29 Aug 35.1 °C 30 % 24 km/h 0.0 mm High 34
30 Aug 34.4 °C 29 % 34 km/h 0.0 mm Very high 39
31 Aug 34.7 °C 29 % 29 km/h 0.0 mm High 36
1 Sept 32.3 °C 47 % 28 km/h 0.1 mm High 29
2 Sept after 31.0 °C 43 % 25 km/h 0.1 mm High 28
3 Sept after 32.3 °C 40 % 28 km/h 0.0 mm High 26
4 Sept after 33.8 °C 35 % 27 km/h 0.0 mm High 28
5 Sept after 33.6 °C 33 % 27 km/h 0.0 mm High 31
6 Sept after 31.1 °C 49 % 39 km/h 0.8 mm Moderate 20
7 Sept after 33.7 °C 45 % 28 km/h 1.4 mm Moderate 16

Before and after, from space

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

Before · 9 Aug 2021
After · 8 Sept 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 · 535Every 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 Juara fire last?
GWIS (Copernicus) dates it between 16 August 2021 and 1 September 2021: 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 12,910 hectares (129.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Juara (12,976 ha, 0.6 %).
What was the weather like?
During the fire the temperature reached 36.2 °C, humidity dropped to 17 % and gusts hit 41 km/h. The fire danger index (FWI) reached 49, 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
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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.