How long did the Juína fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 10 August 2024 to 18 September 2024 (40 days). The perimeter dates it from 15 August 2024 to 13 September 2024.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 21,147 hectares (211.5 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Juína (21,298 ha, 0.8 %).

What was the weather like?

During the fire the temperature reached 36.9 °C, humidity dropped to 14 % and gusts hit 42 km/h. The fire danger index (FWI) reached 48, 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.

BR · Brazil · 2024-08-10 → 2024-09-18

Juína fire, 10 August 2024 Juína

Out · last detection 18 Sept 2024, 04:34 UTC

The fire started on 10 August 2024 in Juína, Brazil, and satellites saw it burning for 40 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 21,147 hectares from heat detections, spread across a single municipality.

It is the 175th largest in Mato Grosso since 2016 (of 1996 with a page). Number 139 in Brazil in 2024, of 1301.

Compare with…

Suggestions: Juína · 2019 Juína · 2016

Burnt area: 21,147ha; GWIS perimeter (Copernicus)
Duration: 40days; 10 Aug 2024 – 18 Sept 2024
Municipalities hit: 1; municipalities
Started on: 10 Aug; 2024
Heat detections: 1,267; in a single hotspot: 281 MW
Danger at start: 35; High · FWI index
Average daily power: 346MW; detected power per day, on average

HOTSPOTS BY DAY 10 Aug18 Sept

Play back 18 Sept 2024

How it evolved, day by day

10 Aug 17 Aug 22 Aug 28 Aug 1 Sept 2 Sept 7 Sept 12 Sept

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

The weather it burned in

37°high

42km/h · peak gust

14%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started. Rain came after the fire: 2.6 mm on 26 Sept.

This area had burned before

22% of the perimeter overlaps earlier fires recorded since 2016: 1,287 ha in 2019, 2,473 ha in 2021, 969 ha in 2022.

How big is it?

It burned the equivalent of 13% of the area of London (211 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

Juína 45,869 inhabitants where it started

21,298 ha reached on 10 Aug

0.8 %

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 2025

Built-up area< 0.1 ha

Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.

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	27.0 °C	33 %	40 km/h	0.0 mm	High 35
11 Aug	32.1 °C	25 %	24 km/h	0.0 mm	High 33
12 Aug	31.9 °C	21 %	31 km/h	0.0 mm	Very high 39
13 Aug	33.1 °C	17 %	29 km/h	0.0 mm	Very high 42
14 Aug	35.2 °C	17 %	29 km/h	0.0 mm	Very high 41
15 Aug	35.8 °C	21 %	25 km/h	0.0 mm	Very high 40
16 Aug	33.2 °C	35 %	22 km/h	0.3 mm	High 33
17 Aug	34.7 °C	28 %	27 km/h	0.0 mm	High 34
18 Aug	35.8 °C	21 %	27 km/h	0.0 mm	High 38
19 Aug	34.8 °C	25 %	22 km/h	0.0 mm	High 37
20 Aug	35.5 °C	19 %	28 km/h	0.0 mm	Very high 38
21 Aug	35.7 °C	18 %	32 km/h	0.0 mm	Very high 41
22 Aug	35.5 °C	22 %	33 km/h	0.0 mm	Very high 41
23 Aug	36.5 °C	20 %	22 km/h	0.0 mm	Very high 40
24 Aug	34.9 °C	26 %	26 km/h	0.0 mm	Very high 44
25 Aug	27.7 °C	38 %	42 km/h	0.0 mm	High 37
26 Aug	29.1 °C	28 %	34 km/h	0.0 mm	High 36
27 Aug	33.0 °C	24 %	26 km/h	0.0 mm	High 35
28 Aug	35.5 °C	18 %	28 km/h	0.0 mm	Very high 41
29 Aug	35.5 °C	22 %	38 km/h	0.0 mm	Very high 46
30 Aug	35.1 °C	18 %	42 km/h	0.0 mm	Very high 46
31 Aug	35.7 °C	22 %	32 km/h	0.0 mm	Very high 43
1 Sept	36.4 °C	20 %	32 km/h	0.0 mm	Very high 43
2 Sept	36.2 °C	14 %	33 km/h	0.0 mm	Very high 46
3 Sept	36.5 °C	21 %	35 km/h	0.0 mm	Very high 46
4 Sept	35.2 °C	25 %	31 km/h	0.0 mm	Very high 42
5 Sept	36.8 °C	17 %	31 km/h	0.0 mm	Very high 48
6 Sept	35.6 °C	16 %	29 km/h	0.0 mm	Very high 45
7 Sept	35.7 °C	16 %	30 km/h	0.0 mm	Very high 45
8 Sept	36.0 °C	19 %	27 km/h	0.0 mm	Very high 43
9 Sept	36.9 °C	15 %	35 km/h	0.0 mm	Very high 46
10 Sept	35.8 °C	22 %	27 km/h	0.0 mm	Very high 45
11 Sept	35.2 °C	29 %	33 km/h	0.0 mm	Very high 41
12 Sept	35.0 °C	29 %	27 km/h	0.0 mm	High 38
13 Sept	34.8 °C	30 %	25 km/h	0.0 mm	High 37
14 Sept	35.0 °C	31 %	20 km/h	0.0 mm	High 35
15 Sept	33.2 °C	37 %	24 km/h	0.0 mm	High 34
16 Sept	32.8 °C	38 %	32 km/h	0.2 mm	High 34
17 Sept	35.9 °C	25 %	27 km/h	0.0 mm	High 37
18 Sept	35.3 °C	31 %	22 km/h	0.0 mm	High 37
19 Sept after	33.4 °C	38 %	39 km/h	0.0 mm	High 36
20 Sept after	36.0 °C	25 %	33 km/h	0.0 mm	Very high 39
21 Sept after	35.4 °C	27 %	26 km/h	0.0 mm	High 36
22 Sept after	36.1 °C	28 %	34 km/h	0.0 mm	High 37
23 Sept after	35.9 °C	30 %	28 km/h	0.0 mm	High 37
24 Sept after	35.3 °C	34 %	25 km/h	0.2 mm	High 36
25 Sept after	36.5 °C	25 %	34 km/h	0.0 mm	High 36
26 Sept after	33.8 °C	42 %	27 km/h	2.6 mm	Moderate 13

Before and after, from space

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

↔

Before · 3 Aug 2024

After · 25 Sept 2024

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.

The smoke

CAMS · Copernicus

On 8 September 2024 the air beside the fire reached 203 µg/m³ of PM2.5. That day averaged 133: 8.9 times the WHO daily guideline (15).

PM2.5 peak203 µg/m³

Days over the guideline33 days

PM10291 µg/m³

Optical depth4.13

WHO 15

1314151617181920212223242526272829303112345678910111213141516

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 · 1,267Every 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 Juína fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 10 August 2024 to 18 September 2024 (40 days). The perimeter dates it from 15 August 2024 to 13 September 2024.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 21,147 hectares (211.5 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Juína (21,298 ha, 0.8 %).
What was the weather like?: During the fire the temperature reached 36.9 °C, humidity dropped to 14 % and gusts hit 42 km/h. The fire danger index (FWI) reached 48, 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 · Emergency number and official warnings ›

INPE · Programa Queimadas ↗
IBAMA · Prevfogo ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

No changes since 24 October 2026.

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.

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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.

How we know this

Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
Dates adjusted with the VIIRS detections inside the perimeter, which said 15 August 2024 to 13 September 2024. 1,267 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 2025, 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.

Where it burned