How long did the Seruyan fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 30 August 2026 to 8 September 2026 (10 days). The perimeter dates it from 30 August 2026 to 5 September 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,831 hectares (38.3 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Seruyan (3,858 ha, 0.2 %).

What was the weather like?

During the fire the temperature reached 34.7 °C, humidity dropped to 39 % and gusts hit 33 km/h. The fire danger index (FWI) reached 29, 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.

ID · Indonesia · 2026-08-30 → 2026-09-08

Seruyan fire, 30 August 2026 Seruyan

Out · last detection 8 Sept 2026, 18:15 UTC

The fire started on 30 August 2026 in Seruyan, Indonesia, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,831 hectares from heat detections, spread across a single municipality.

It is the 106th largest in Central Kalimantan since 2016 (of 310 with a page). Number 301 in Indonesia in 2026, of 988.

Burnt area: 3,831ha; GWIS perimeter (Copernicus)
Duration: 10days; 30 Aug 2026 – 8 Sept 2026
Municipalities hit: 1; regencies
Started on: 30 Aug; 2026
Heat detections: 132; in a single hotspot: 101 MW
Danger at start: 27; High · FWI index
Energy released: 1.2GW; sum of detected power

Play back 8 Sept 2026

HOTSPOTS BY DAY 30 Aug8 Sept

How it evolved, day by day

303112368

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

35°high

33km/h · peak gust

39%lowest humidity

It had gone 31 days without rain (1 mm or more) when it started.

This area had burned before

62% of the perimeter overlaps earlier fires recorded since 2016: 1,860 ha in 2019, 1,610 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 2,360 ha that had burned before.

What happened to each town

Seruyan where it started

3,858 ha reached on 30 Aug

0.2 %

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)
30 Aug	34.3 °C	44 %	25 km/h	0.0 mm	High 27
31 Aug	34.7 °C	43 %	30 km/h	0.0 mm	High 29
1 Sept	34.1 °C	41 %	33 km/h	0.0 mm	High 29
2 Sept	34.0 °C	39 %	30 km/h	0.0 mm	High 28
3 Sept	33.3 °C	45 %	28 km/h	0.0 mm	High 28
4 Sept	32.7 °C	53 %	29 km/h	0.0 mm	High 26
5 Sept	33.3 °C	43 %	31 km/h	0.0 mm	High 26
6 Sept	33.4 °C	45 %	26 km/h	0.0 mm	High 25
7 Sept	31.9 °C	58 %	27 km/h	0.0 mm	High 23
8 Sept	32.2 °C	58 %	27 km/h	0.2 mm	High 23
9 Sept after	33.2 °C	47 %	29 km/h	0.0 mm	High 24
10 Sept after	33.9 °C	45 %	30 km/h	0.0 mm	High 26
11 Sept after	34.3 °C	44 %	32 km/h	0.0 mm	High 27
12 Sept after	33.8 °C	47 %	27 km/h	0.0 mm	High 26
13 Sept after	32.3 °C	59 %	30 km/h	0.0 mm	High 23
14 Sept after	34.0 °C	43 %	31 km/h	0.0 mm	High 27
15 Sept after	33.5 °C	46 %	26 km/h	0.1 mm	High 26
16 Sept after	31.5 °C	52 %	27 km/h	0.0 mm	High 25
17 Sept after	31.1 °C	54 %	20 km/h	0.0 mm	High 22
18 Sept after	34.7 °C	38 %	25 km/h	0.0 mm	High 28

Before and after, from space

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

↔

Before · 23 Aug 2026

After · 15 Sept 2026

Before After

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 3 September 2026 the air beside the fire reached 229 µg/m³ of PM2.5. That day averaged 94: 6.3 times the WHO daily guideline (15).

PM2.5 peak229 µg/m³

Days over the guideline12 days

PM10235 µg/m³

Optical depth4.11

WHO 15

2829303112345678

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 · 132Every 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 time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in Indonesia ›

Frequently asked questions

How long did the Seruyan fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 30 August 2026 to 8 September 2026 (10 days). The perimeter dates it from 30 August 2026 to 5 September 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,831 hectares (38.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Seruyan (3,858 ha, 0.2 %).
What was the weather like?: During the fire the temperature reached 34.7 °C, humidity dropped to 39 % and gusts hit 33 km/h. The fire danger index (FWI) reached 29, 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

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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.

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What really happened?

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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 112.

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.

Where it burned