Dianópolis fire, 10 August 2026 Dianópolis, Rio da Conceição
The fire started on 10 August 2026 in Dianópolis, Brazil, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 8,148 hectares from heat detections, spread across 2 municipalities.
It is the 288th largest in Tocantins since 2016 (of 1242 with a page). Number 158 in Brazil in 2026, of 747.
- Burnt area
- 8,148ha
- GWIS perimeter (Copernicus)
- Duration
- 11days
- 10 Aug 2026 – 20 Aug 2026
- Municipalities hit
- 2
- municipalities
- Started on
- 10 Aug
- 2026
- Heat detections
- 243
- in a single hotspot: 188 MW
- Danger at start
- 50
- Very high · FWI index
- Energy released
- 2.1GW
- sum of detected power
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 33 days without rain (1 mm or more) when it started.
This area had burned before
92% of the perimeter overlaps earlier fires recorded since 2016: 2,918 ha in 2016, 712 ha in 2017, 2,357 ha in 2019, 1,403 ha in 2020, 142 ha in 2021, 3,447 ha in 2022, 3,547 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 7,466 ha that had burned before.
- 2,951 ha Dianópolis fire, September 2022 5,660 ha in total; the hectares shown are those it shares with this fire
- 1,597 ha Dianópolis fire, August 2024 9,704 ha in total; the hectares shown are those it shares with this fire
- 355 ha Dianópolis fire, August 2024 13,262 ha in total; the hectares shown are those it shares with this fire
- 142 ha Rio da Conceição fire, September 2021 6,987 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
7,988 ha reached on 10 Aug2.4 %
-
Rio da Conceição 1,768 inhabitants201 ha0.2 %
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) |
|---|---|---|---|---|---|
| 10 Aug | 35.7 °C | 19 % | 46 km/h | 0.0 mm | Very high 50 |
| 11 Aug | 32.5 °C | 19 % | 54 km/h | 0.0 mm | Extreme 54 |
| 12 Aug | 31.6 °C | 21 % | 49 km/h | 0.0 mm | Extreme 54 |
| 13 Aug | 30.8 °C | 29 % | 49 km/h | 0.0 mm | Very high 50 |
| 14 Aug | 33.0 °C | 24 % | 46 km/h | 0.0 mm | Very high 47 |
| 15 Aug | 34.1 °C | 20 % | 48 km/h | 0.0 mm | Extreme 51 |
| 16 Aug | 33.1 °C | 19 % | 57 km/h | 0.0 mm | Extreme 56 |
| 17 Aug | 31.5 °C | 25 % | 53 km/h | 0.0 mm | Extreme 56 |
| 18 Aug | 31.8 °C | 29 % | 60 km/h | 0.0 mm | Extreme 55 |
| 19 Aug | 33.2 °C | 22 % | 50 km/h | 0.0 mm | Extreme 51 |
| 20 Aug | 34.4 °C | 22 % | 38 km/h | 0.0 mm | Very high 45 |
| 21 Aug after | 34.8 °C | 22 % | 39 km/h | 0.0 mm | Very high 44 |
| 22 Aug after | 35.8 °C | 18 % | 53 km/h | 0.0 mm | Extreme 58 |
| 23 Aug after | 35.4 °C | 16 % | 55 km/h | 0.0 mm | Extreme 62 |
| 24 Aug after | 34.7 °C | 19 % | 50 km/h | 0.0 mm | Extreme 58 |
| 25 Aug after | 35.2 °C | 22 % | 48 km/h | 0.0 mm | Extreme 58 |
| 26 Aug after | 35.2 °C | 22 % | 53 km/h | 0.0 mm | Extreme 61 |
| 27 Aug after | 35.6 °C | 19 % | 59 km/h | 0.0 mm | Extreme 66 |
| 28 Aug after | 34.5 °C | 23 % | 45 km/h | 0.0 mm | Extreme 56 |
| 29 Aug after | 35.1 °C | 22 % | 45 km/h | 0.0 mm | Extreme 57 |
| 30 Aug after | 36.4 °C | 17 % | 55 km/h | 0.0 mm | Extreme 61 |
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 13 August 2026 the air beside the fire reached 39 µg/m³ of PM2.5. That day averaged 19: 1.3 times the WHO daily 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 · 243Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 13,262 haDianópolis19 August 2024 · 24 days · 9 km away
- 10,911 haRio da ConceiçãoSeptember 2026 · 12 days · 24 km away
- 10,095 haRio da ConceiçãoJune 2026 · 9 days · 27 km away
- 13,590 haDianópolisAugust 2016 · 9 days · 30 km away
- 13,266 haFormosa do Rio Preto15 August 2026 · 9 days · 30 km away
- 11,847 haNovo JardimAugust 2025 · 7 days · 38 km away
Frequently asked questions
- How long did the Dianópolis fire last?
- GWIS (Copernicus) dates it between 10 August 2026 and 20 August 2026: 11 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 8,148 hectares (81.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Dianópolis (7,988 ha, 2.4 %); Rio da Conceição (201 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 35.7 °C, humidity dropped to 19 % and gusts hit 60 km/h. The fire danger index (FWI) reached 56, 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.
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
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.