Chaves fire, October 2026 Chaves
The fire started on 23 October 2026 in Chaves, Brazil, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,114 hectares from heat detections, spread across a single municipality.
It is the 686th largest in Pará since 2016 (of 1110 with a page). Number 484 in Brazil in 2026, of 776.
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Is it still active?
Satellites detected fire on 2 Nov 2026, 05:16 UTC. Everything suggests it is still burning. Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
- Burnt area
- 4,114ha
- GWIS perimeter (Copernicus)
- Duration
- 11days
- 23 Oct 2026 – 2 Nov 2026
- Municipalities hit
- 1
- municipalities
- Started on
- 23 Oct
- 2026
- Heat detections
- 163
- in a single hotspot: 79 MW
- Danger at start
- 11
- Moderate · FWI index
- Average daily power
- 112MW
- detected power per day, on average
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 3 days without rain (1 mm or more) when it started. Rain came after the fire: 1.7 mm on 2 Nov.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
4,141 ha reached on 23 Oct0.3 %
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.
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) · forecast models, provisional until the ERA5 reanalysis arrives
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 23 Oct | 31.9 °C | 57 % | 41 km/h | 0.3 mm | Moderate 11 |
| 24 Oct | 31.8 °C | 59 % | 41 km/h | 0.5 mm | Moderate 12 |
| 25 Oct | 31.4 °C | 61 % | 42 km/h | 2.0 mm | Low 5 |
| 26 Oct | 32.4 °C | 50 % | 41 km/h | 0.0 mm | Moderate 13 |
| 27 Oct | 32.4 °C | 56 % | 34 km/h | 0.0 mm | Moderate 12 |
| 28 Oct | 32.1 °C | 58 % | 37 km/h | 0.3 mm | Moderate 13 |
| 29 Oct | 31.9 °C | 60 % | 44 km/h | 1.2 mm | Low 10 |
| 30 Oct | 31.9 °C | 58 % | 44 km/h | 0.8 mm | Moderate 12 |
| 31 Oct | 32.6 °C | 54 % | 38 km/h | 0.2 mm | Moderate 14 |
| 1 Nov | 31.8 °C | 59 % | 42 km/h | 1.0 mm | Low 11 |
| 2 Nov | 32.3 °C | 57 % | 44 km/h | 1.7 mm | Low 9 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
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 · CopernicusOn 24 October 2026 the air beside the fire reached 13 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).
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 · 163Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Frequently asked questions
- How long did the Chaves fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 23 October 2026 to 2 November 2026 (11 days). The perimeter dates it from 23 October 2026 to 1 November 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,114 hectares (41.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Chaves (4,141 ha, 0.3 %).
- Is the Chaves fire still active?
- Yes: satellites detected fire on 2 Nov 2026, 05:16 UTC. Check the emergency service for the official status.
- What was the weather like?
- During the fire the temperature reached 32.6 °C, humidity dropped to 50 % and gusts hit 44 km/h. The fire danger index (FWI) reached 14, class Moderate.
- 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 ›
Satellite cross-check
History of this page · 3 Changes in area, dates, name, official record or merged pages, compared every night since 31 October 2026.
- Area: 3,951 → 4,114 ha.
- Area: 3,418 → 3,951 ha.
- Page published (3,418 ha).
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
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 23 October 2026 to 1 November 2026. 163 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: ECMWF IFS model, provisional until the ERA5 reanalysis arrives.
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.