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Seruyan fire, 18 August 2026 Seruyan

Out · last detection 2 Oct 2026, 06:44 UTC

The fire started on 18 August 2026 in Seruyan, Indonesia, and satellites saw it burning for 45 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 7,313 hectares from heat detections, spread across a single municipality.

This page is probably a fire complex, not a single fire. GWIS merges into one perimeter the fires that touch over weeks, which in large burning seasons can join dozens of separate fires. The total area is reliable; the origin and dates refer to the whole complex.

Other fire pages in the same area and on the same dates:

It is the 53th largest in Central Kalimantan since 2016 (of 316 with a page). Number 161 in Indonesia in 2026, of 1009.

Compare with…

Suggestions: Seruyan · 2019Seruyan · 2026

Burnt area
7,313ha
GWIS perimeter (Copernicus)
Duration
45days
18 Aug 2026 – 1 Oct 2026
Municipalities hit
1
regencies
Started on
18 Aug
2026
Heat detections
404
in a single hotspot: 114 MW
Danger at start
28
High · FWI index
Average daily power
125MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 18 Aug1 Oct
2 Oct 2026

How it evolved, day by day

18 Aug 2026 · 14 MW · 3 20 Aug 2026 · 70 MW · 3 21 Aug 2026 · 695 MW · 27 23 Aug 2026 · 20 MW · 5 24 Aug 2026 · 23 MW · 3 25 Aug 2026 · 30 MW · 4 26 Aug 2026 · 229 MW · 18 27 Aug 2026 · 66 MW · 14 28 Aug 2026 · 134 MW · 18 29 Aug 2026 · 23 MW · 6 30 Aug 2026 · 7 MW · 2 31 Aug 2026 · 4 MW · 1 1 Sept 2026 · 419 MW · 25 2 Sept 2026 · 44 MW · 7 3 Sept 2026 · 25 MW · 5 4 Sept 2026 · 27 MW · 3 5 Sept 2026 · 44 MW · 11 6 Sept 2026 · 217 MW · 15 11 Sept 2026 · 156 MW · 30 14 Sept 2026 · 613 MW · 17 15 Sept 2026 · 27 MW · 4 16 Sept 2026 · 234 MW · 18 17 Sept 2026 · 69 MW · 14 18 Sept 2026 · 7 MW · 4 19 Sept 2026 · 266 MW · 23 20 Sept 2026 · 146 MW · 29 21 Sept 2026 · 80 MW · 21 22 Sept 2026 · 172 MW · 30 23 Sept 2026 · 195 MW · 17 24 Sept 2026 · 12 MW · 1 27 Sept 2026 · 9 MW · 2 28 Sept 2026 · 78 MW · 9 1 Oct 2026 · 35 MW · 7 2 Oct 2026 · 75 MW · 8
18 Aug 21 Aug 25 Aug 30 Aug 4 Sept 15 Sept 20 Sept 27 Sept

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

The weather it burned in

33°high
52km/h · peak gust
43%lowest humidity

It had gone 19 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: 20 ha in 2018, 3,639 ha in 2019, 2,622 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 4,557 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 4.6% of the area of London (73 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Seruyan where it started
    7,369 ha reached on 18 Aug
    0.4 %

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)
18 Aug 32.6 °C 43 % 49 km/h 0.0 mm High 28
19 Aug 31.2 °C 54 % 44 km/h 0.0 mm High 25
20 Aug 31.9 °C 49 % 42 km/h 0.0 mm High 26
21 Aug 31.6 °C 53 % 41 km/h 0.0 mm High 26
22 Aug 31.2 °C 58 % 42 km/h 0.0 mm High 24
23 Aug 30.1 °C 62 % 46 km/h 0.7 mm Moderate 18
24 Aug 30.7 °C 58 % 51 km/h 0.0 mm High 23
25 Aug 31.1 °C 56 % 49 km/h 0.0 mm High 24
26 Aug 31.6 °C 49 % 45 km/h 0.0 mm High 25
27 Aug 31.5 °C 52 % 44 km/h 0.0 mm High 25
28 Aug 31.1 °C 51 % 46 km/h 0.0 mm High 26
29 Aug 31.4 °C 53 % 42 km/h 0.0 mm High 24
30 Aug 31.7 °C 50 % 36 km/h 0.0 mm High 24
31 Aug 31.3 °C 57 % 41 km/h 0.0 mm High 25
1 Sept 31.8 °C 49 % 52 km/h 0.0 mm High 29
2 Sept 31.2 °C 52 % 44 km/h 0.1 mm High 27
3 Sept 31.4 °C 55 % 46 km/h 0.0 mm High 28
4 Sept 31.3 °C 56 % 46 km/h 0.0 mm High 28
5 Sept 31.2 °C 56 % 47 km/h 0.0 mm High 29
6 Sept 30.9 °C 57 % 47 km/h 0.0 mm High 27
7 Sept 31.2 °C 59 % 48 km/h 0.3 mm High 26
8 Sept 31.8 °C 56 % 42 km/h 0.0 mm High 27
9 Sept 31.6 °C 56 % 45 km/h 0.2 mm High 27
10 Sept 32.4 °C 54 % 46 km/h 0.0 mm High 28
11 Sept 32.3 °C 52 % 50 km/h 0.0 mm High 29
12 Sept 31.5 °C 54 % 46 km/h 0.0 mm High 28
13 Sept 31.9 °C 61 % 49 km/h 0.0 mm High 27
14 Sept 31.2 °C 57 % 51 km/h 0.3 mm High 28
15 Sept 31.3 °C 56 % 48 km/h 0.0 mm High 27
16 Sept 31.8 °C 53 % 48 km/h 0.0 mm High 27
17 Sept 31.2 °C 57 % 37 km/h 0.6 mm Moderate 21
18 Sept 32.8 °C 44 % 40 km/h 0.0 mm High 28
19 Sept 33.2 °C 49 % 44 km/h 0.0 mm High 30
20 Sept 32.7 °C 48 % 47 km/h 0.0 mm High 30
21 Sept 31.4 °C 57 % 43 km/h 0.0 mm High 26
22 Sept 32.5 °C 52 % 45 km/h 0.0 mm High 28
23 Sept 33.0 °C 49 % 44 km/h 0.0 mm High 28
24 Sept 32.0 °C 55 % 39 km/h 0.0 mm High 27
25 Sept 31.5 °C 61 % 38 km/h 0.1 mm High 24
26 Sept 32.4 °C 63 % 36 km/h 0.6 mm Moderate 20
27 Sept 32.3 °C 57 % 36 km/h 0.0 mm High 22
28 Sept 32.3 °C 54 % 35 km/h 0.3 mm High 23
29 Sept 32.8 °C 55 % 35 km/h 0.0 mm High 23
30 Sept 30.8 °C 70 % 37 km/h 1.5 mm Low 11
1 Oct 32.9 °C 46 % 44 km/h 0.0 mm High 26
2 Oct after 33.0 °C 47 % 41 km/h 0.0 mm High 28
3 Oct after 32.1 °C 54 % 45 km/h 0.0 mm High 29
4 Oct after 32.3 °C 53 % 44 km/h 0.0 mm High 28
5 Oct after 33.2 °C 46 % 42 km/h 0.0 mm High 29
6 Oct after 32.2 °C 48 % 45 km/h 0.0 mm High 31
7 Oct after 33.0 °C 48 % 43 km/h 0.0 mm High 31
8 Oct after 32.3 °C 51 % 38 km/h 0.0 mm High 29
9 Oct after 32.1 °C 51 % 36 km/h 0.2 mm High 28
10 Oct after 31.9 °C 56 % 36 km/h 0.0 mm High 27
11 Oct after 32.7 °C 48 % 44 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 · 11 Aug 2026
After · 8 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 16 September 2026 the air beside the fire reached 291 µg/m³ of PM2.5. That day averaged 129: 8.6 times the WHO daily guideline (15).

PM2.5 peak291 µg/m³
Days over the guideline49 days
PM10295 µg/m³
Optical depth4.39
161718192021222324252627282930311234567891011121314151617181920212223242526272829301234
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 · 404Every 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 timeSatelliteFRP (MW)LatLon

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 18 August 2026 to 1 October 2026 (45 days). The perimeter dates it from 25 August 2026 to 24 September 2026.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 7,313 hectares (73.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Seruyan (7,369 ha, 0.4 %).
Is the Seruyan fire still active?
No fire detections since 2 Oct 2026, 06:44 UTC. A lack of detections is not an official extinction.
What was the weather like?
During the fire the temperature reached 33.2 °C, humidity dropped to 43 % and gusts hit 52 km/h. The fire danger index (FWI) reached 30, 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 · 3 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Area: 3,269 → 7,313 ha.
  2. Last day with fire: 24 September 2026 → 1 October 2026.
  3. Start date: 11 September 2026 → 18 August 2026.

RSS Changes to this page

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
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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.

How we know this
  • Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 25 August 2026 to 24 September 2026. 404 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.

How we build fire pages: methodology ›

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.