Paser fire, 10 September 2026 Paser, Kutai Barat
The fire started on 10 September 2026 in Paser, Indonesia, and satellites saw it burning for 44 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 35,246 hectares from heat detections, spread across 2 municipalities.
It is the largest fire in East Kalimantan since 2016 (of 97 with a page). Number 27 in Indonesia in 2026, of 988.
Is it still active?
Satellites detected fire on 23 Oct 2026, 17:52 UTC. Everything suggests it is still burning. Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
- Burnt area
- 35,246ha
- GWIS perimeter (Copernicus)
- Duration
- 44days
- 10 Sept 2026 – 23 Oct 2026
- Municipalities hit
- 2
- regencies
- Started on
- 10 Sept
- 2026
- Heat detections
- 725
- in a single hotspot: 199 MW
- Danger at start
- 26
- High · FWI index
- Energy released
- 5.0GW
- sum of detected power
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 39 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
-
Paser where it started35,437 ha reached on 10 Sept3.3 %
-
40 ha reached on 11 Oct0.0 %
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) |
|---|---|---|---|---|---|
| 10 Sept | 33.5 °C | 42 % | 35 km/h | 0.0 mm | High 26 |
| 11 Sept | 32.3 °C | 50 % | 39 km/h | 0.0 mm | High 26 |
| 12 Sept | 33.0 °C | 49 % | 32 km/h | 0.8 mm | Moderate 18 |
| 13 Sept | 32.4 °C | 51 % | 40 km/h | 0.3 mm | High 22 |
| 14 Sept | 34.0 °C | 41 % | 41 km/h | 0.0 mm | High 28 |
| 15 Sept | 33.9 °C | 42 % | 36 km/h | 0.0 mm | High 26 |
| 16 Sept | 31.1 °C | 50 % | 30 km/h | 0.9 mm | Moderate 17 |
| 17 Sept | 30.5 °C | 49 % | 32 km/h | 4.7 mm | Low 6 |
| 18 Sept | 34.4 °C | 35 % | 31 km/h | 1.4 mm | Moderate 16 |
| 19 Sept | 33.7 °C | 45 % | 35 km/h | 0.0 mm | High 22 |
| 20 Sept | 33.2 °C | 43 % | 35 km/h | 0.0 mm | High 23 |
| 21 Sept | 34.2 °C | 42 % | 32 km/h | 0.0 mm | High 24 |
| 22 Sept | 34.4 °C | 43 % | 32 km/h | 0.0 mm | High 24 |
| 23 Sept | 33.8 °C | 48 % | 28 km/h | 1.0 mm | Moderate 17 |
| 24 Sept | 33.2 °C | 52 % | 27 km/h | 2.3 mm | Low 8 |
| 25 Sept | 32.2 °C | 58 % | 23 km/h | 1.7 mm | Low 7 |
| 26 Sept | 33.5 °C | 52 % | 26 km/h | 0.4 mm | Moderate 15 |
| 27 Sept | 33.7 °C | 50 % | 30 km/h | 0.1 mm | Moderate 19 |
| 28 Sept | 35.0 °C | 39 % | 24 km/h | 0.8 mm | Moderate 20 |
| 29 Sept | 33.8 °C | 46 % | 32 km/h | 0.4 mm | High 22 |
| 30 Sept | 34.9 °C | 43 % | 36 km/h | 0.0 mm | High 25 |
| 1 Oct | 32.8 °C | 51 % | 30 km/h | 1.0 mm | Moderate 16 |
| 2 Oct | 35.5 °C | 36 % | 37 km/h | 0.0 mm | High 28 |
| 3 Oct | 34.7 °C | 40 % | 43 km/h | 0.0 mm | High 29 |
| 4 Oct | 34.5 °C | 41 % | 36 km/h | 0.0 mm | High 28 |
| 5 Oct | 34.2 °C | 39 % | 41 km/h | 0.0 mm | High 30 |
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 233 µg/m³ of PM2.5. That day averaged 193: 13 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 · 725Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Paser fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 10 September 2026 to 23 October 2026 (44 days). The perimeter dates it from 14 September 2026 to 22 October 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 35,246 hectares (352.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Paser (35,437 ha, 3.3 %); Kutai Barat (40 ha, 0.0 %).
- Is the Paser fire still active?
- Yes: satellites detected fire on 23 Oct 2026, 17:52 UTC. Check the emergency service for the official status.
- What was the weather like?
- During the fire the temperature reached 35.5 °C, humidity dropped to 35 % and gusts hit 43 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
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
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.