How long did the Lamandau fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 5 August 2026 to 20 September 2026 (47 days). The perimeter dates it from 5 August 2026 to 13 September 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,405 hectares (124.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Lamandau (12,490 ha, 1.7 %).

What was the weather like?

During the fire the temperature reached 35.7 °C, humidity dropped to 35 % and gusts hit 35 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.

ID · Indonesia · 2026-08-05 → 2026-09-20

Lamandau fire, 5 August 2026 Lamandau

Out · last detection 20 Sept 2026, 17:49 UTC

The fire started on 5 August 2026 in Lamandau, Indonesia, and satellites saw it burning for 47 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,405 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 37th largest in Central Kalimantan since 2016 (of 317 with a page). Number 87 in Indonesia in 2026, of 1007.

Compare with…

Suggestions: Lamandau · 2023 Lamandau · 2026 Lamandau · 2026 Lamandau · 2026

Burnt area: 12,405ha; GWIS perimeter (Copernicus)
Duration: 47days; 5 Aug 2026 – 20 Sept 2026
Municipalities hit: 1; regencies
Started on: 5 Aug; 2026
Heat detections: 926; in a single hotspot: 313 MW
Danger at start: 12; Moderate · FWI index
Average daily power: 184MW; detected power per day, on average

HOTSPOTS BY DAY 5 Aug20 Sept

Play back 20 Sept 2026

How it evolved, day by day

5 Aug 11 Aug 19 Aug 25 Aug 31 Aug 1 Sept 6 Sept 15 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

35km/h · peak gust

35%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 7.1 mm on 25 Sept.

This area had burned before

18% of the perimeter overlaps earlier fires recorded since 2016: 206 ha in 2019, 1,998 ha in 2023.

1,998 ha Lamandau fire, September 2023 1,667 ha in total; the hectares shown are those it shares with this fire

How big is it?

It burned the equivalent of 7.8% of the area of London (124 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

Lamandau where it started

12,490 ha reached on 5 Aug

1.7 %

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.

People and buildings inside the perimeter

GHSL 2025

Built-up area< 0.1 ha

Residents≈ 30

Inside the perimeter there were about 0.06 hectares of built-up land and about 30 residents (GHSL 2025, satellite-based estimate).

This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.

Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu

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)
31 Jul	33.3 °C	49 %	34 km/h	0.0 mm	Moderate 12
1 Aug	31.9 °C	58 %	32 km/h	1.6 mm	Low 6
2 Aug	33.5 °C	47 %	27 km/h	0.0 mm	Moderate 12
3 Aug	33.7 °C	46 %	27 km/h	0.0 mm	Moderate 14
4 Aug	33.9 °C	42 %	31 km/h	0.0 mm	Moderate 17
5 Aug	33.8 °C	39 %	29 km/h	0.0 mm	Moderate 18
6 Aug	33.5 °C	45 %	26 km/h	0.0 mm	Moderate 18
7 Aug	33.2 °C	44 %	28 km/h	0.0 mm	Moderate 19
8 Aug	32.9 °C	41 %	28 km/h	0.0 mm	Moderate 19
9 Aug	33.0 °C	40 %	28 km/h	0.0 mm	Moderate 20
10 Aug	33.0 °C	43 %	25 km/h	0.0 mm	Moderate 20
11 Aug	32.8 °C	43 %	28 km/h	0.0 mm	Moderate 21
12 Aug	32.6 °C	48 %	29 km/h	0.0 mm	Moderate 21
13 Aug	32.2 °C	53 %	28 km/h	0.0 mm	Moderate 19
14 Aug	33.4 °C	50 %	30 km/h	0.0 mm	Moderate 20
15 Aug	32.8 °C	49 %	30 km/h	0.0 mm	Moderate 20
16 Aug	33.8 °C	46 %	31 km/h	0.0 mm	Moderate 21
17 Aug	34.0 °C	45 %	28 km/h	0.0 mm	High 21
18 Aug	34.5 °C	39 %	31 km/h	0.0 mm	High 24
19 Aug	34.4 °C	41 %	28 km/h	0.0 mm	High 23
20 Aug	34.0 °C	41 %	27 km/h	0.0 mm	High 24
21 Aug	33.7 °C	43 %	32 km/h	0.0 mm	High 26
22 Aug	33.6 °C	47 %	28 km/h	0.0 mm	High 25
23 Aug	32.2 °C	53 %	30 km/h	0.0 mm	High 22
24 Aug	32.1 °C	54 %	30 km/h	0.0 mm	High 22
25 Aug	33.2 °C	47 %	35 km/h	0.0 mm	High 24
26 Aug	33.8 °C	43 %	30 km/h	0.0 mm	High 23
27 Aug	33.6 °C	43 %	27 km/h	0.0 mm	High 23
28 Aug	33.2 °C	42 %	34 km/h	0.0 mm	High 25
29 Aug	33.7 °C	40 %	31 km/h	0.0 mm	High 25
30 Aug	34.2 °C	40 %	26 km/h	0.0 mm	High 25
31 Aug	33.9 °C	47 %	29 km/h	0.0 mm	High 27
1 Sept	33.9 °C	42 %	35 km/h	0.0 mm	High 28
2 Sept	33.5 °C	40 %	31 km/h	0.0 mm	High 27
3 Sept	32.8 °C	47 %	30 km/h	0.0 mm	High 27
4 Sept	32.7 °C	50 %	32 km/h	0.0 mm	High 27
5 Sept	33.0 °C	43 %	32 km/h	0.0 mm	High 26
6 Sept	32.8 °C	46 %	30 km/h	0.0 mm	High 27
7 Sept	32.3 °C	54 %	28 km/h	0.0 mm	High 24
8 Sept	32.8 °C	53 %	27 km/h	2.2 mm	Low 9
9 Sept	32.8 °C	48 %	31 km/h	0.0 mm	Moderate 19
10 Sept	33.1 °C	46 %	31 km/h	0.0 mm	High 23
11 Sept	33.6 °C	46 %	32 km/h	0.0 mm	High 24
12 Sept	33.8 °C	44 %	28 km/h	0.0 mm	High 24
13 Sept	31.8 °C	63 %	28 km/h	0.0 mm	Moderate 20
14 Sept	33.9 °C	41 %	34 km/h	0.0 mm	High 26
15 Sept	32.8 °C	48 %	28 km/h	0.1 mm	High 25
16 Sept	30.6 °C	56 %	28 km/h	0.1 mm	High 22
17 Sept	30.2 °C	58 %	22 km/h	0.0 mm	Moderate 20
18 Sept	33.7 °C	44 %	27 km/h	0.0 mm	High 24
19 Sept	34.5 °C	42 %	27 km/h	0.0 mm	High 25
20 Sept	35.7 °C	35 %	31 km/h	0.0 mm	High 30
21 Sept after	35.0 °C	42 %	23 km/h	0.0 mm	High 28
22 Sept after	35.2 °C	37 %	30 km/h	0.0 mm	High 31
23 Sept after	35.2 °C	38 %	28 km/h	0.0 mm	High 30
24 Sept after	35.5 °C	39 %	28 km/h	0.0 mm	High 30
25 Sept after	34.3 °C	52 %	29 km/h	7.1 mm	Low 6

Before and after, from space

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

↔

Before · 29 Jul 2026

After · 27 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 16 September 2026 the air beside the fire reached 374 µg/m³ of PM2.5. That day averaged 185: 12 times the WHO daily guideline (15).

PM2.5 peak374 µg/m³

Days over the guideline44 days

PM10386 µg/m³

Optical depth6.84

WHO 15

34567891011121314151617181920212223242526272829303112345678910111213141516

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 · 926Every 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 Lamandau fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 5 August 2026 to 20 September 2026 (47 days). The perimeter dates it from 5 August 2026 to 13 September 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,405 hectares (124.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Lamandau (12,490 ha, 1.7 %).
What was the weather like?: During the fire the temperature reached 35.7 °C, humidity dropped to 35 % and gusts hit 35 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

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

No changes since 24 October 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

What do you think is wrong?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

Your connection to the fire (optional) Email (optional)

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 5 August 2026 to 13 September 2026. 926 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.
Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

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.

Where it burned