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Lassance fire, September 2026 Brazil

Out · last measured on 1 Oct 2026

Satellites first detected fire on 30 September 2026 in Lassance, Brazil. It has been active for 2 days, with 39 heat detections and an area with fire of about 616 hectares rebuilt from them, spread across a single municipality.

GWIS (Copernicus) has not yet published the perimeter of this fire. It rebuilds it from hotspots, which can take several days, and it does not always arrive. For now the area is the one rebuilt from heat detections (about 14 hectares per pixel). If the perimeter arrives, this page picks it up on its own and keeps the same address.

Area with fire
≈ 616ha
rebuilt from hotspots, no official perimeter yet
Duration
2days
30 Sept 2026 – 1 Oct 2026
Municipalities hit
0
municipalities
Started on
30 Sept
2026
Heat detections
39
in a single hotspot: 62 MW
Danger at start
27
High · FWI index

Where it burned

HOTSPOTS BY DAY 30 Sept1 Oct

The weather it burned in

32°high
30km/h · peak gust
23%lowest humidity

It had gone 5 days without rain (1 mm or more) when it started.

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)
30 Sept 32.4 °C 23 % 28 km/h 0.0 mm High 27
1 Oct 32.2 °C 32 % 30 km/h 0.0 mm High 27
2 Oct after 30.2 °C 37 % 42 km/h 0.3 mm High 30

Before and after, from space

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

Before · 23 Sept 2026
After · 8 Oct 2026

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 29 September 2026 the air beside the fire reached 19 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak19 µg/m³
Days over the guideline0 days
PM1019 µg/m³
Optical depth0.19
2829301
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 · 39Every 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 Lassance fire last?
According to the heat detections seen by satellite, it burned from 30 September 2026 to 1 October 2026 (2 days between the first and the last detection). There is no perimeter yet to date it.
How much area did it burn?
There is no perimeter yet. Heat detections rebuild about 616 hectares with fire (6.2 km²), a rough figure; GWIS will give its own when it publishes the perimeter, which can take several days.
Is the Lassance fire still active?
No fire detections since 1 October 2026. A lack of detections is not an official extinction.
What was the weather like?
During the fire the temperature reached 32.4 °C, humidity dropped to 23 % and gusts hit 30 km/h. The fire danger index (FWI) reached 27, 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

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.