How long did the Sanggau fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 2 August 2026 to 19 August 2026 (18 days). The perimeter dates it from 2 August 2026 to 12 August 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 9,919 hectares (99.2 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Sanggau (9,986 ha, 0.8 %).

What was the weather like?

During the fire the temperature reached 35.1 °C, humidity dropped to 41 % and gusts hit 26 km/h. The fire danger index (FWI) reached 13, class Moderate.

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 · 2026-08-02 → 2026-08-19

Sanggau fire, 2 August 2026 Sanggau

Out · last detection 19 Aug 2026, 06:50 UTC

The fire started on 2 August 2026 in Sanggau, Indonesia, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 9,919 hectares from heat detections, spread across a single municipality.

It is the 17th largest in West Kalimantan since 2016 (of 268 with a page). Number 108 in Indonesia in 2026, of 1022.

Compare with…

Suggestions: Sanggau · 2026 Sanggau · 2026 Sanggau · 2026 Sanggau · 2026

Burnt area: 9,919ha; GWIS perimeter (Copernicus)
Duration: 18days; 2 Aug 2026 – 19 Aug 2026
Municipalities hit: 1; regencies
Started on: 2 Aug; 2026
Heat detections: 147; in a single hotspot: 109 MW
Danger at start: 1; Very low · FWI index
Average daily power: 140MW; detected power per day, on average

HOTSPOTS BY DAY 2 Aug19 Aug

Play back 19 Aug 2026

How it evolved, day by day

2 Aug 6 Aug 8 Aug 10 Aug 12 Aug 15 Aug 19 Aug

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

The weather it burned in

35°high

26km/h · peak gust

41%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 1.7 mm on 26 Aug.

This area had burned before

57% of the perimeter overlaps earlier fires recorded since 2016: 199 ha in 2016, 66 ha in 2017, 1,832 ha in 2018, 1,500 ha in 2019, 538 ha in 2020, 445 ha in 2021, 855 ha in 2022, 2,215 ha in 2023, 1,556 ha in 2024, 1,154 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 5,644 ha that had burned before.

How big is it?

It burned the equivalent of 6.3% of the area of London (99 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

Sanggau where it started

9,986 ha reached on 2 Aug

0.8 %

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 area15 ha

Residents≈ 3,100

Inside the perimeter there were about 15 hectares of built-up land and about 3,100 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)
2 Aug	33.2 °C	63 %	24 km/h	1.9 mm	Very low 1
3 Aug	33.7 °C	58 %	18 km/h	1.4 mm	Very low 2
4 Aug	34.4 °C	48 %	19 km/h	0.0 mm	Low 6
5 Aug	34.3 °C	41 %	20 km/h	0.0 mm	Low 8
6 Aug	34.4 °C	47 %	17 km/h	0.0 mm	Low 10
7 Aug	34.3 °C	47 %	20 km/h	0.0 mm	Low 10
8 Aug	34.4 °C	43 %	23 km/h	0.0 mm	Moderate 12
9 Aug	34.2 °C	43 %	19 km/h	0.0 mm	Moderate 11
10 Aug	34.3 °C	45 %	18 km/h	0.0 mm	Low 11
11 Aug	33.9 °C	47 %	17 km/h	0.0 mm	Moderate 12
12 Aug	33.7 °C	52 %	18 km/h	0.0 mm	Moderate 13
13 Aug	33.3 °C	55 %	19 km/h	0.0 mm	Moderate 12
14 Aug	35.1 °C	46 %	20 km/h	0.0 mm	Moderate 13
15 Aug	33.9 °C	53 %	20 km/h	1.6 mm	Low 6
16 Aug	34.5 °C	52 %	23 km/h	1.0 mm	Low 9
17 Aug	33.0 °C	59 %	23 km/h	9.9 mm	Very low 1
18 Aug	35.0 °C	46 %	26 km/h	0.0 mm	Low 6
19 Aug	34.4 °C	48 %	18 km/h	0.2 mm	Low 10
20 Aug after	33.5 °C	51 %	19 km/h	0.0 mm	Low 10
21 Aug after	34.7 °C	44 %	19 km/h	0.0 mm	Moderate 12
22 Aug after	34.5 °C	47 %	20 km/h	0.0 mm	Moderate 12
23 Aug after	33.3 °C	61 %	18 km/h	0.9 mm	Low 7
24 Aug after	34.0 °C	55 %	21 km/h	0.3 mm	Low 10
25 Aug after	34.8 °C	50 %	18 km/h	0.6 mm	Low 11
26 Aug after	34.1 °C	52 %	21 km/h	1.7 mm	Low 7

Before and after, from space

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

↔

Before · 26 Jul 2026

After · 26 Aug 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 6 August 2026 the air beside the fire reached 857 µg/m³ of PM2.5. That day averaged 236: 16 times the WHO daily guideline (15).

PM2.5 peak857 µg/m³

Days over the guideline29 days

PM10872 µg/m³

Optical depth3.96

WHO 15

242526272829303112345678910111213141516171819202122

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 · 147Every 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 Sanggau fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 2 August 2026 to 19 August 2026 (18 days). The perimeter dates it from 2 August 2026 to 12 August 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 9,919 hectares (99.2 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Sanggau (9,986 ha, 0.8 %).
What was the weather like?: During the fire the temperature reached 35.1 °C, humidity dropped to 41 % and gusts hit 26 km/h. The fire danger index (FWI) reached 13, class Moderate.
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 · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 12 August 2026 → 19 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

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; 3 polygons grouped in this page.
Dates adjusted with the VIIRS detections inside the perimeter, which said 2 August 2026 to 12 August 2026. 147 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