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Paser fire, 25 August 2026 Paser

Out · last detection 4 Oct 2026, 05:10 UTC

The fire started on 25 August 2026 in Paser, Indonesia, and satellites saw it burning for 41 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 8,358 hectares from heat detections, spread across a single municipality.

It is the 12th largest in East Kalimantan since 2016 (of 98 with a page). Number 128 in Indonesia in 2026, of 1005.

Burnt area
8,358ha
GWIS perimeter (Copernicus)
Duration
41days
25 Aug 2026 – 4 Oct 2026
Municipalities hit
1
regencies
Started on
25 Aug
2026
Heat detections
302
in a single hotspot: 94 MW
Danger at start
23
High · FWI index
Average daily power
62MW
detected power per day, on average

Where it burned

4 Oct 2026
HOTSPOTS BY DAY 25 Aug4 Oct

How it evolved, day by day

25 Aug 2026 · 9 MW · 1 26 Aug 2026 · 6 MW · 2 27 Aug 2026 · 3 MW · 1 28 Aug 2026 · 114 MW · 5 29 Aug 2026 · 22 MW · 5 30 Aug 2026 · 1 MW · 1 2 Sept 2026 · 25 MW · 6 3 Sept 2026 · 17 MW · 4 4 Sept 2026 · 7 MW · 4 5 Sept 2026 · 1 MW · 1 6 Sept 2026 · 184 MW · 10 12 Sept 2026 · 258 MW · 26 13 Sept 2026 · 112 MW · 17 14 Sept 2026 · 41 MW · 22 15 Sept 2026 · 149 MW · 25 18 Sept 2026 · 130 MW · 19 19 Sept 2026 · 127 MW · 24 20 Sept 2026 · 50 MW · 30 21 Sept 2026 · 191 MW · 37 22 Sept 2026 · 109 MW · 21 23 Sept 2026 · 9 MW · 2 24 Sept 2026 · 144 MW · 15 25 Sept 2026 · 7 MW · 6 26 Sept 2026 · 15 MW · 6 27 Sept 2026 · 1 MW · 1 28 Sept 2026 · 11 MW · 2 30 Sept 2026 · 12 MW · 3 1 Oct 2026 · 3 MW · 1 2 Oct 2026 · 49 MW · 5 4 Oct 2026 · 0 MW · 0
25 Aug 30 Aug 6 Sept 12 Sept 18 Sept 23 Sept 28 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

36°high
34km/h · peak gust
32%lowest humidity

It had gone 19 days without rain (1 mm or more) when it started.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

  1. Paser where it started
    8,413 ha reached on 25 Aug
    0.8 %

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)
18 Aug 34.0 °C 38 % 27 km/h 0.0 mm High 23
19 Aug 33.9 °C 40 % 21 km/h 0.0 mm High 22
20 Aug 33.7 °C 41 % 22 km/h 0.0 mm High 23
21 Aug 33.1 °C 42 % 24 km/h 0.0 mm High 24
22 Aug 33.4 °C 43 % 24 km/h 0.0 mm High 23
23 Aug 33.8 °C 42 % 20 km/h 0.0 mm High 23
24 Aug 32.4 °C 49 % 22 km/h 0.1 mm High 21
25 Aug 33.5 °C 37 % 28 km/h 0.0 mm High 24
26 Aug 33.7 °C 34 % 27 km/h 0.0 mm High 26
27 Aug 33.8 °C 35 % 26 km/h 0.0 mm High 25
28 Aug 33.8 °C 32 % 25 km/h 0.0 mm High 26
29 Aug 33.8 °C 37 % 26 km/h 0.0 mm High 27
30 Aug 33.9 °C 41 % 20 km/h 0.0 mm High 26
31 Aug 34.3 °C 40 % 26 km/h 0.0 mm High 28
1 Sept 33.2 °C 38 % 27 km/h 0.0 mm High 28
2 Sept 34.0 °C 35 % 29 km/h 0.0 mm High 29
3 Sept 32.8 °C 42 % 18 km/h 0.0 mm High 25
4 Sept 33.7 °C 43 % 26 km/h 0.0 mm High 27
5 Sept 33.5 °C 40 % 24 km/h 0.0 mm High 27
6 Sept 34.0 °C 39 % 27 km/h 0.0 mm High 27
7 Sept 33.2 °C 45 % 27 km/h 0.0 mm High 27
8 Sept 34.2 °C 37 % 26 km/h 0.6 mm High 26
9 Sept 32.4 °C 46 % 28 km/h 0.1 mm High 26
10 Sept 34.6 °C 35 % 30 km/h 0.0 mm High 28
11 Sept 33.9 °C 40 % 34 km/h 0.0 mm High 30
12 Sept 33.8 °C 44 % 25 km/h 0.0 mm High 27
13 Sept 33.3 °C 46 % 34 km/h 0.1 mm High 29
14 Sept 34.5 °C 37 % 33 km/h 0.0 mm High 30
15 Sept 34.5 °C 38 % 29 km/h 0.0 mm High 28
16 Sept 28.2 °C 59 % 17 km/h 5.2 mm Very low 3
17 Sept 28.7 °C 55 % 21 km/h 0.2 mm Low 7
18 Sept 34.0 °C 37 % 17 km/h 0.6 mm Moderate 18
19 Sept 35.1 °C 35 % 29 km/h 0.0 mm High 25
20 Sept 34.5 °C 38 % 32 km/h 0.0 mm High 27
21 Sept 35.3 °C 32 % 30 km/h 0.0 mm High 30
22 Sept 36.0 °C 32 % 24 km/h 0.0 mm High 28
23 Sept 33.8 °C 47 % 18 km/h 3.6 mm Low 5
24 Sept 33.2 °C 49 % 21 km/h 2.2 mm Low 6
25 Sept 31.5 °C 61 % 15 km/h 3.2 mm Very low 3
26 Sept 33.2 °C 51 % 20 km/h 1.8 mm Very low 5
27 Sept 34.5 °C 40 % 31 km/h 0.7 mm Moderate 16
28 Sept 33.5 °C 50 % 23 km/h 13.2 mm Very low 2
29 Sept 34.0 °C 44 % 31 km/h 0.0 mm Low 10
30 Sept 34.1 °C 46 % 22 km/h 0.7 mm Moderate 11
1 Oct 34.9 °C 39 % 25 km/h 0.2 mm Moderate 16
2 Oct 35.0 °C 41 % 26 km/h 0.0 mm Moderate 16
3 Oct 34.6 °C 41 % 23 km/h 0.0 mm Moderate 17
4 Oct 35.0 °C 37 % 21 km/h 0.0 mm Moderate 17
5 Oct after 35.5 °C 33 % 28 km/h 0.0 mm Moderate 21

Before and after, from space

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

Before · 18 Aug 2026
After · 11 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 22 September 2026 the air beside the fire reached 442 µg/m³ of PM2.5. That day averaged 316: 21 times the WHO daily guideline (15).

PM2.5 peak442 µg/m³
Days over the guideline40 days
PM10452 µg/m³
Optical depth8.63
2324252627282930311234567891011121314151617181920212223242526272829301
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 · 302Every 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 Paser fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 25 August 2026 to 4 October 2026 (41 days). The perimeter dates it from 25 August 2026 to 28 September 2026.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 8,358 hectares (83.6 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Paser (8,413 ha, 0.8 %).
Is the Paser fire still active?
No fire detections since 4 Oct 2026, 05:10 UTC. A lack of detections is not an official extinction.
What was the weather like?
During the fire the temperature reached 36.0 °C, humidity dropped to 32 % and gusts hit 34 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

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.