Seruyan fire, 26 August 2026 Seruyan
The fire started on 26 August 2026 in Seruyan, Indonesia, and satellites saw it burning for 32 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,579 hectares from heat detections, spread across a single municipality.
It is the 75th largest in Central Kalimantan since 2016 (of 316 with a page). Number 216 in Indonesia in 2026, of 1024.
Compare with…
- Burnt area
- 5,579ha
- GWIS perimeter (Copernicus)
- Duration
- 32days
- 26 Aug 2026 – 26 Sept 2026
- Municipalities hit
- 1
- regencies
- Started on
- 26 Aug
- 2026
- Heat detections
- 517
- in a single hotspot: 89 MW
- Danger at start
- 26
- High · FWI index
- Average daily power
- 141MW
- 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 11 days without rain (1 mm or more) when it started.
This area had burned before
91% of the perimeter overlaps earlier fires recorded since 2016: 630 ha in 2018, 6,660 ha in 2019, 6,307 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 5,049 ha that had burned before.
- 2,809 ha Seruyan fire, October 2019 12,267 ha in total; the hectares shown are those it shares with this fire
- 1,844 ha Seruyan fire, October 2023 2,130 ha in total; the hectares shown are those it shares with this fire
- 1,775 ha Seruyan fire, September 2023 15,275 ha in total; the hectares shown are those it shares with this fire
- 966 ha Seruyan fire, October 2023 1,517 ha in total; the hectares shown are those it shares with this fire
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Jakarta boundary: geoBoundaries · Badan Pusat Statistik (BPS - Statistics Indonesia), World Food Programme, OCHA ROAP (CC BY 3.0 IGO).
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).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Seruyan where it started5,564 ha reached on 26 Aug0.3 %
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) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 26 Aug | 32.0 °C | 47 % | 47 km/h | 0.0 mm | High 26 |
| 27 Aug | 31.9 °C | 49 % | 46 km/h | 0.0 mm | High 26 |
| 28 Aug | 31.3 °C | 51 % | 46 km/h | 0.0 mm | High 26 |
| 29 Aug | 31.5 °C | 54 % | 44 km/h | 0.0 mm | High 25 |
| 30 Aug | 32.0 °C | 50 % | 40 km/h | 0.0 mm | High 25 |
| 31 Aug | 31.5 °C | 57 % | 42 km/h | 0.0 mm | High 25 |
| 1 Sept | 32.1 °C | 49 % | 54 km/h | 0.0 mm | High 29 |
| 2 Sept | 31.5 °C | 51 % | 48 km/h | 0.0 mm | High 28 |
| 3 Sept | 31.4 °C | 55 % | 48 km/h | 0.0 mm | High 27 |
| 4 Sept | 31.6 °C | 55 % | 48 km/h | 0.0 mm | High 28 |
| 5 Sept | 31.1 °C | 58 % | 48 km/h | 0.0 mm | High 27 |
| 6 Sept | 30.9 °C | 55 % | 47 km/h | 0.0 mm | High 26 |
| 7 Sept | 30.8 °C | 62 % | 46 km/h | 0.7 mm | Moderate 20 |
| 8 Sept | 31.7 °C | 60 % | 43 km/h | 0.4 mm | Moderate 21 |
| 9 Sept | 32.3 °C | 54 % | 45 km/h | 0.2 mm | High 24 |
| 10 Sept | 32.7 °C | 53 % | 46 km/h | 0.0 mm | High 26 |
| 11 Sept | 32.1 °C | 53 % | 50 km/h | 0.0 mm | High 27 |
| 12 Sept | 32.1 °C | 53 % | 48 km/h | 0.0 mm | High 26 |
| 13 Sept | 31.6 °C | 63 % | 50 km/h | 0.1 mm | High 26 |
| 14 Sept | 31.1 °C | 57 % | 53 km/h | 0.0 mm | High 27 |
| 15 Sept | 31.6 °C | 57 % | 49 km/h | 0.0 mm | High 25 |
| 16 Sept | 31.9 °C | 51 % | 50 km/h | 0.0 mm | High 26 |
| 17 Sept | 31.3 °C | 59 % | 38 km/h | 0.8 mm | Moderate 19 |
| 18 Sept | 33.2 °C | 44 % | 42 km/h | 0.0 mm | High 28 |
| 19 Sept | 33.6 °C | 49 % | 47 km/h | 0.0 mm | High 30 |
| 20 Sept | 33.2 °C | 45 % | 49 km/h | 0.0 mm | High 31 |
| 21 Sept | 31.8 °C | 56 % | 45 km/h | 0.0 mm | High 27 |
| 22 Sept | 32.8 °C | 51 % | 46 km/h | 0.0 mm | High 28 |
| 23 Sept | 33.2 °C | 49 % | 45 km/h | 0.0 mm | High 29 |
| 24 Sept | 32.6 °C | 53 % | 42 km/h | 0.0 mm | High 28 |
| 25 Sept | 32.1 °C | 58 % | 39 km/h | 0.2 mm | High 26 |
| 26 Sept | 31.7 °C | 66 % | 37 km/h | 1.5 mm | Moderate 12 |
| 27 Sept after | 32.4 °C | 56 % | 36 km/h | 0.0 mm | Moderate 20 |
| 28 Sept after | 32.9 °C | 53 % | 35 km/h | 0.1 mm | High 23 |
| 29 Sept after | 33.0 °C | 53 % | 36 km/h | 0.2 mm | High 24 |
| 30 Sept after | 31.1 °C | 69 % | 38 km/h | 0.9 mm | Moderate 15 |
| 1 Oct after | 33.2 °C | 45 % | 44 km/h | 0.2 mm | High 28 |
| 2 Oct after | 33.7 °C | 45 % | 43 km/h | 0.0 mm | High 30 |
| 3 Oct after | 32.9 °C | 51 % | 45 km/h | 0.0 mm | High 30 |
| 4 Oct after | 33.1 °C | 49 % | 44 km/h | 0.0 mm | High 30 |
| 5 Oct after | 33.6 °C | 46 % | 43 km/h | 0.0 mm | High 31 |
| 6 Oct after | 33.1 °C | 44 % | 48 km/h | 0.0 mm | High 32 |
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 16 September 2026 the air beside the fire reached 73 µg/m³ of PM2.5. That day averaged 24: 1.6 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 · 517Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 2,130 haSeruyan13 October 2023 · 5 days · 0 km away
- 12,267 haSeruyan25 October 2019 · 19 days · 2 km away
- 15,275 haSeruyan11 September 2023 · 27 days · 6 km away
- 2,904 haKotawaringin BaratOctober 2019 · 14 days · 18 km away
- 18,825 haKotawaringin BaratAugust 2019 · 42 days · 19 km away
- 4,004 haSeruyan5 November 2019 · 8 days · 25 km away
Frequently asked questions
- How long did the Seruyan fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 26 August 2026 to 26 September 2026 (32 days). The perimeter dates it from 26 August 2026 to 19 September 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 5,579 hectares (55.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Seruyan (5,564 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 33.6 °C, humidity dropped to 44 % and gusts hit 54 km/h. The fire danger index (FWI) reached 31, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Indonesia (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: 112 · Emergency number and official warnings ›
Satellite cross-check
History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 30 October 2026.
- Page published (5,579 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 26 August 2026 to 19 September 2026. 517 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.
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.