Dianópolis fire, August 2025 Novo Jardim, Ponte Alta do Bom Jesus, Dianópolis
The fire started on 28 August 2025 in Dianópolis, Brazil, and satellites saw it burning for 22 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 15,994 hectares from heat detections, spread across 3 municipalities.
It is the 93th largest in Tocantins since 2016 (of 1242 with a page). Number 52 in Brazil in 2025, of 714.
- Burnt area
- 15,994ha
- GWIS perimeter (Copernicus)
- Duration
- 22days
- 28 Aug 2025 – 18 Sept 2025
- Municipalities hit
- 3
- municipalities
- Started on
- 28 Aug
- 2025
- Heat detections
- 647
- in a single hotspot: 49 MW
- Danger at start
- 50
- Very high · FWI index
- Energy released
- 2.6GW
- 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 more than two months without rain (1 mm or more) when it started. Rain came after the fire: 5.5 mm on 23 Sept.
This area had burned before
87% of the perimeter overlaps earlier fires recorded since 2016: 4,877 ha in 2016, 3,860 ha in 2017, 12,098 ha in 2019, 1,390 ha in 2020, 3,607 ha in 2021, 782 ha in 2022, 10,332 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 13,987 ha that had burned before.
- 8,144 ha Novo Jardim fire, September 2023 14,405 ha in total; the hectares shown are those it shares with this fire
- 3,603 ha Novo Jardim fire, August 2016 5,202 ha in total; the hectares shown are those it shares with this fire
- 3,215 ha Novo Jardim fire, September 2021 4,110 ha in total; the hectares shown are those it shares with this fire
- 2,961 ha Novo Jardim fire, September 2017 7,221 ha in total; the hectares shown are those it shares with this fire
- 137 ha Dianópolis fire, August 2019 4,577 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Novo Jardim 17,739 inhabitants14,670 ha reached on 24 Aug12 %
-
Ponte Alta do Bom Jesus 4,220 inhabitants1,243 ha reached on 13 Sept0.7 %
-
185 ha reached on 28 Aug0.1 %
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) |
|---|---|---|---|---|---|
| 24 Aug | 34.4 °C | 23 % | 40 km/h | 0.0 mm | Very high 50 |
| 25 Aug | 35.2 °C | 20 % | 40 km/h | 0.0 mm | Very high 49 |
| 26 Aug | 35.8 °C | 22 % | 44 km/h | 0.0 mm | Extreme 52 |
| 27 Aug | 35.7 °C | 21 % | 45 km/h | 0.0 mm | Extreme 51 |
| 28 Aug | 35.8 °C | 21 % | 40 km/h | 0.0 mm | Very high 49 |
| 29 Aug | 35.9 °C | 19 % | 41 km/h | 0.0 mm | Extreme 51 |
| 30 Aug | 35.7 °C | 22 % | 42 km/h | 0.0 mm | Extreme 52 |
| 31 Aug | 36.4 °C | 19 % | 45 km/h | 0.0 mm | Extreme 52 |
| 1 Sept | 34.5 °C | 24 % | 48 km/h | 0.0 mm | Extreme 54 |
| 2 Sept | 34.1 °C | 24 % | 48 km/h | 0.0 mm | Extreme 54 |
| 3 Sept | 34.8 °C | 22 % | 49 km/h | 0.0 mm | Extreme 54 |
| 4 Sept | 34.5 °C | 25 % | 47 km/h | 0.0 mm | Extreme 52 |
| 5 Sept | 34.8 °C | 23 % | 43 km/h | 0.0 mm | Extreme 51 |
| 6 Sept | 36.1 °C | 20 % | 36 km/h | 0.0 mm | Very high 47 |
| 7 Sept | 36.6 °C | 20 % | 38 km/h | 0.0 mm | Very high 48 |
| 8 Sept | 36.7 °C | 21 % | 45 km/h | 0.0 mm | Extreme 53 |
| 9 Sept | 36.9 °C | 19 % | 38 km/h | 0.0 mm | Very high 49 |
| 10 Sept | 39.3 °C | 14 % | 27 km/h | 0.0 mm | Very high 48 |
| 11 Sept | 39.3 °C | 15 % | 34 km/h | 0.0 mm | Extreme 51 |
| 12 Sept | 38.1 °C | 18 % | 40 km/h | 0.0 mm | Extreme 57 |
| 13 Sept | 36.9 °C | 20 % | 38 km/h | 0.0 mm | Extreme 56 |
| 14 Sept | 37.0 °C | 20 % | 32 km/h | 0.0 mm | Very high 49 |
| 15 Sept | 36.9 °C | 19 % | 41 km/h | 0.0 mm | Extreme 56 |
| 16 Sept | 36.8 °C | 20 % | 42 km/h | 0.0 mm | Extreme 56 |
| 17 Sept | 37.6 °C | 20 % | 42 km/h | 0.0 mm | Extreme 58 |
| 18 Sept | 38.2 °C | 19 % | 37 km/h | 0.0 mm | Extreme 55 |
| 19 Sept after | 33.8 °C | 32 % | 28 km/h | 0.0 mm | Very high 41 |
| 20 Sept after | 35.0 °C | 27 % | 34 km/h | 0.0 mm | Very high 41 |
| 21 Sept after | 36.6 °C | 23 % | 37 km/h | 0.0 mm | Very high 43 |
| 22 Sept after | 34.8 °C | 40 % | 27 km/h | 0.2 mm | High 31 |
| 23 Sept after | 34.4 °C | 36 % | 30 km/h | 5.5 mm | Moderate 11 |
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 September 2025 the air beside the fire reached 42 µg/m³ of PM2.5. That day averaged 16: 1.1 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 · 647Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 14,405 haNovo JardimSeptember 2023 · 17 days · 3 km away
- 24,304 haPonte Alta do Bom Jesus5 September 2019 · 19 days · 12 km away
- 42,200 haPonte Alta do Bom JesusAugust 2025 · 21 days · 29 km away
- 28,189 haNovo JardimAugust 2019 · 19 days · 34 km away
- 25,313 haBarreiras20 August 2021 · 9 days · 36 km away
Frequently asked questions
- How long did the Dianópolis fire last?
- GWIS (Copernicus) dates it between 28 August 2025 and 18 September 2025: 22 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 15,994 hectares (159.9 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Novo Jardim (14,670 ha, 12 %); Ponte Alta do Bom Jesus (1,243 ha, 0.7 %); Dianópolis (185 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 39.3 °C, humidity dropped to 14 % and gusts hit 49 km/h. The fire danger index (FWI) reached 58, 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.