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Seruyan fire, 15 September 2026 Seruyan, Kotawaringin Barat

Out · last measured on 27 Sept 2026

The fire started on 15 September 2026 in Seruyan, Indonesia, and satellites saw it burning for 13 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,803 hectares from heat detections, spread across 2 municipalities.

It is the 250th largest in Central Kalimantan since 2016 (of 310 with a page). Number 740 in Indonesia in 2026, of 988.

We have the GWIS perimeter for this fire, but not yet its hotspots: NASA publishes the yearly hotspot archive only once the year closes. The page picks them up automatically when they are available.

Burnt area
1,803ha
GWIS perimeter (Copernicus)
Duration
13days
15 Sept 2026 – 27 Sept 2026
Municipalities hit
2
regencies
Started on
15 Sept
2026
Danger at start
25
High · FWI index

Where it burned

The weather it burned in

37°high
31km/h · peak gust
31%lowest humidity

It had gone 47 days without rain (1 mm or more) when it started. Rain came after the fire: 1.7 mm on 30 Sept.

This area had burned before

1% of the perimeter overlaps earlier fires recorded since 2016: 15 ha in 2023.

What happened to each town

  1. Seruyan where it started
    1,048 ha
    0.1 %
  2. Kotawaringin Barat
    767 ha
    0.1 %

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)
15 Sept 33.5 °C 46 % 26 km/h 0.1 mm High 25
16 Sept 31.5 °C 52 % 27 km/h 0.0 mm High 24
17 Sept 31.1 °C 54 % 20 km/h 0.0 mm High 22
18 Sept 34.7 °C 38 % 25 km/h 0.0 mm High 28
19 Sept 35.0 °C 41 % 28 km/h 0.0 mm High 29
20 Sept 36.8 °C 31 % 31 km/h 0.0 mm High 34
21 Sept 35.4 °C 41 % 27 km/h 0.0 mm High 32
22 Sept 35.5 °C 37 % 30 km/h 0.0 mm High 34
23 Sept 35.2 °C 40 % 28 km/h 0.0 mm High 34
24 Sept 36.2 °C 38 % 30 km/h 0.0 mm High 34
25 Sept 32.5 °C 65 % 28 km/h 0.9 mm Moderate 16
26 Sept 34.3 °C 53 % 27 km/h 1.1 mm Moderate 15
27 Sept 33.3 °C 57 % 21 km/h 12.8 mm Very low 3
28 Sept after 34.2 °C 45 % 20 km/h 0.0 mm Moderate 12
29 Sept after 34.4 °C 48 % 26 km/h 0.0 mm Moderate 19
30 Sept after 33.2 °C 59 % 30 km/h 1.7 mm Low 10

Before and after, from space

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

Before · 8 Sept 2026
After · 4 Oct 2026

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 21 September 2026 the air beside the fire reached 555 µg/m³ of PM2.5. That day averaged 290: 19 times the WHO daily guideline (15).

PM2.5 peak555 µg/m³
Days over the guideline18 days
PM10566 µg/m³
Optical depth6.86
131415161718192021222324252627282930
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)

Other fires nearby

All fires in Indonesia ›

Frequently asked questions

How long did the Seruyan fire last?
GWIS (Copernicus) dates it between 15 September 2026 and 27 September 2026: 13 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 1,803 hectares (18.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Seruyan (1,048 ha, 0.1 %); Kotawaringin Barat (767 ha, 0.1 %).
Is the Seruyan fire still active?
No fire detections since 27 September 2026. A lack of detections is not an official extinction.
What was the weather like?
During the fire the temperature reached 36.8 °C, humidity dropped to 31 % and gusts hit 31 km/h. The fire danger index (FWI) reached 34, 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

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
What do you think is wrong?

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.