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Ribeirão Cascalheira fire, 24 September 2024 Ribeirão Cascalheira

Out · last detection 5 Oct 2024, 16:48 UTC

The fire started on 24 September 2024 in Ribeirão Cascalheira, Brazil, and satellites saw it burning for 12 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,730 hectares from heat detections, spread across a single municipality.

It is the 324th largest in Mato Grosso since 2016 (of 1872 with a page). Number 236 in Brazil in 2024, of 1301.

Burnt area
12,730ha
GWIS perimeter (Copernicus)
Duration
12days
24 Sept 2024 – 5 Oct 2024
Municipalities hit
1
municipalities
Started on
24 Sept
2024
Heat detections
311
in a single hotspot: 269 MW
Danger at start
46
Very high · FWI index
Average daily power
418MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 24 Sept5 Oct
5 Oct 2024

How it evolved, day by day

24 Sept 2024 · 180 MW · 20 25 Sept 2024 · 841 MW · 112 26 Sept 2024 · 2,923 MW · 135 27 Sept 2024 · 11 MW · 3 28 Sept 2024 · 66 MW · 4 29 Sept 2024 · 91 MW · 5 30 Sept 2024 · 277 MW · 5 1 Oct 2024 · 20 MW · 4 2 Oct 2024 · 143 MW · 19 3 Oct 2024 · 29 MW · 3 5 Oct 2024 · 13 MW · 1
26 Sept 30 Sept 3 Oct

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

The weather it burned in

41°high
39km/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: 2.5 mm on 11 Oct.

This area had burned before

79% of the perimeter overlaps earlier fires recorded since 2016: 883 ha in 2016, 4,239 ha in 2017, 912 ha in 2018, 6,027 ha in 2019, 1,526 ha in 2021, 3,624 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 10,036 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 8% of the area of London (127 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. Ribeirão Cascalheira 10,089 inhabitants where it started
    12,809 ha reached on 24 Sept
    1.1 %

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 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)

Started with 60 days without rain: 55 % of the area in Brazil

Day High Min. humidity Peak gust Rain Danger (FWI)
24 Sept 39.0 °C 20 % 17 km/h 0.0 mm Very high 46
25 Sept 38.5 °C 20 % 23 km/h 0.0 mm Very high 47
26 Sept 38.9 °C 25 % 26 km/h 0.0 mm Very high 44
27 Sept 37.8 °C 28 % 29 km/h 0.0 mm Very high 42
28 Sept 39.2 °C 24 % 23 km/h 0.0 mm Very high 42
29 Sept 39.6 °C 22 % 34 km/h 0.0 mm Very high 47
30 Sept 39.4 °C 19 % 39 km/h 0.0 mm Extreme 52
1 Oct 38.2 °C 24 % 26 km/h 0.0 mm Very high 43
2 Oct 39.4 °C 19 % 31 km/h 0.0 mm Very high 46
3 Oct 40.6 °C 17 % 20 km/h 0.0 mm Very high 44
4 Oct 40.5 °C 19 % 19 km/h 0.0 mm Very high 46
5 Oct 40.7 °C 22 % 22 km/h 0.0 mm Very high 45
6 Oct after 39.8 °C 26 % 32 km/h 0.0 mm Extreme 52
7 Oct after 37.8 °C 30 % 30 km/h 0.0 mm Very high 40
8 Oct after 38.5 °C 33 % 27 km/h 0.1 mm Very high 39
9 Oct after 39.1 °C 26 % 23 km/h 0.0 mm Very high 38
10 Oct after 38.9 °C 31 % 32 km/h 0.0 mm Very high 43
11 Oct after 35.4 °C 40 % 23 km/h 2.5 mm Moderate 15

Its twins: fires that started in the same weather

It started with an FWI of 45.7, a minimum humidity of 20% and more than two months without rain. Fires in the area that started in weather like this since 2016: 38.

FWI at the start 45.7
Minimum humidity 20 %
Days without rain 60+
this fire chosen twins rest of the area
Almost identicalSimilar

Outlines of the closest twins

Cocalinho fire, September 2016
13,410 ha 21 days FWI 46.2 Min. humidity 20 % 110 km away, in 2016

First rain (1 mm or more) after it ended: 10.2 mm on 23 Sept.

What happened to them

9 days
median duration
6,342 ha
median area
32 %
went past 10,000 ha
2.3 mm
rain at the end (median; 11 of 38 had it)

It was 2.0 times larger than the median of its twins and lasted 12 days, against 9 days.

Only 11 of its 38 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 27 of 38, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.3 mm.

This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it

How it ended

2.5 mmfirst rain
11 Oct6 days after it ended
39km/h · max. gust

It was considered over on 5 Oct, and on 11 Oct 2.5 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 11 of 38, with a median of 2.3 mm.

Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

How a twin is chosen

  • Same area: fires that have already ended, less than 250 km from this one, since 2016.
  • Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
  • Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
  • Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
  • They are sorted by similarity, and the outlines of the first five are drawn.

How we calculate it

Before and after, from space

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

Before · 17 Sept 2024
After · 12 Oct 2024

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 27 September 2024 the air beside the fire reached 226 µg/m³ of PM2.5. That day averaged 132: 8.8 times the WHO daily guideline (15).

PM2.5 peak226 µg/m³
Days over the guideline16 days
PM10323 µg/m³
Optical depth1.91
22 Sept26 Sept30 Sept4 Oct8 Oct
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 · 311Every 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 Ribeirão Cascalheira fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 24 September 2024 to 5 October 2024 (12 days). The perimeter dates it from 25 September 2024 to 29 September 2024.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,730 hectares (127.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Ribeirão Cascalheira (12,809 ha, 1.1 %).
What was the weather like?
During the fire the temperature reached 40.7 °C, humidity dropped to 17 % and gusts hit 39 km/h. The fire danger index (FWI) reached 52, class Extreme.
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.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 38. Their median duration was 9 days and their median area 6,342 ha; 32 % went past 10,000 ha. Only 11 of its 38 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 27 of 38, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.3 mm.

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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Last day with fire: 29 September 2024 → 5 October 2024.
  2. Start date: 25 September 2024 → 24 September 2024.

RSS Changes to this page With cross-checks and a citable version

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; 2 polygons grouped in this page.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 25 September 2024 to 29 September 2024. 311 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.