How long did the Mappi fire last?

GWIS (Copernicus) dates it between 25 September 2026 and 29 September 2026: 5 days between the first and last heat detection of the perimeter.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,145 hectares (21.4 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Mappi (2,161 ha, 0.1 %).

Is the Mappi fire still active?

No fire detections since 29 Sept 2026, 03:57 UTC. A lack of detections is not an official extinction.

What was the weather like?

During the fire the temperature reached 34.5 °C, humidity dropped to 38 % and gusts hit 35 km/h. The fire danger index (FWI) reached 28, 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 · 2026-09-25 → 2026-09-29

Mappi fire, 25 September 2026 Mappi

Out · last detection 29 Sept 2026, 03:57 UTC

The fire started on 25 September 2026 in Mappi, Indonesia, and satellites saw it burning for 5 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,145 hectares from heat detections, spread across a single municipality.

It is the 195th largest in Papua since 2016 (of 350 with a page). Number 609 in Indonesia in 2026, of 1004.

Compare with…

Suggestions: Mappi · 2026 Mappi · 2026 Mappi · 2026 Mappi · 2026

Burnt area: 2,145ha; GWIS perimeter (Copernicus)
Duration: 5days; 25 Sept 2026 – 29 Sept 2026
Municipalities hit: 1; regencies
Started on: 25 Sept; 2026
Heat detections: 32; in a single hotspot: 39 MW
Danger at start: 23; High · FWI index
Average daily power: 100MW; detected power per day, on average

HOTSPOTS BY DAY 25 Sept29 Sept

Play back 29 Sept 2026

How it evolved, day by day

25 Sept 26 Sept 27 Sept 29 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

34°high

35km/h · peak gust

38%lowest humidity

It had gone 26 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.

How big is it?

It burned the equivalent of 1.4% of the area of London (21 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

Mappi where it started

2,161 ha

0.1 %

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)
25 Sept	33.4 °C	44 %	30 km/h	0.0 mm	High 23
26 Sept	33.7 °C	42 %	34 km/h	0.1 mm	High 25
27 Sept	34.5 °C	39 %	35 km/h	0.1 mm	High 27
28 Sept	34.3 °C	38 %	35 km/h	0.0 mm	High 28
29 Sept	34.0 °C	38 %	33 km/h	0.0 mm	High 28
30 Sept after	32.9 °C	43 %	24 km/h	0.0 mm	High 26
1 Oct after	33.9 °C	40 %	37 km/h	0.0 mm	High 30
2 Oct after	34.0 °C	42 %	40 km/h	0.0 mm	High 31
3 Oct after	32.8 °C	45 %	30 km/h	0.0 mm	High 28
4 Oct after	33.5 °C	44 %	32 km/h	0.2 mm	High 28
5 Oct after	34.0 °C	41 %	30 km/h	0.1 mm	High 28

Before and after, from space

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

↔

Before · 18 Sept 2026

After · 6 Oct 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 30 September 2026 the air beside the fire reached 544 µg/m³ of PM2.5. That day averaged 213: 14 times the WHO daily guideline (15).

PM2.5 peak544 µg/m³

Days over the guideline10 days

PM10550 µg/m³

Optical depth3.65

WHO 15

232425262728293012

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 · 32Every 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 Mappi fire last?: GWIS (Copernicus) dates it between 25 September 2026 and 29 September 2026: 5 days between the first and last heat detection of the perimeter.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,145 hectares (21.4 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Mappi (2,161 ha, 0.1 %).
Is the Mappi fire still active?: No fire detections since 29 Sept 2026, 03:57 UTC. A lack of detections is not an official extinction.
What was the weather like?: During the fire the temperature reached 34.5 °C, humidity dropped to 38 % and gusts hit 35 km/h. The fire danger index (FWI) reached 28, 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

NASA FIRMS ↗
GWIS · Copernicus ↗

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.
Dates from the perimeter: the VIIRS detections inside it did not change them. 32 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.

Where it burned