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Mappi fire, 1 September 2026 Mappi

Out · last measured on 15 Sept 2026

The fire started on 1 September 2026 in Mappi, Indonesia, and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,933 hectares from heat detections, spread across a single municipality.

It is the 232th largest in Papua since 2016 (of 363 with a page). Number 686 in Indonesia in 2026, of 1005.

We have the GWIS perimeter for this fire, but not yet its hotspots: NASA publishes the yearly hotspot archive only once the year closes. The page picks them up automatically when they are available.

Burnt area
1,933ha
GWIS perimeter (Copernicus)
Duration
15days
1 Sept 2026 – 15 Sept 2026
Municipalities hit
1
regencies
Started on
1 Sept
2026
Danger at start
23
High · FWI index

Where it burned

The weather it burned in

34°high
44km/h · peak gust
38%lowest humidity

It had gone 3 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. Mappi where it started
    1,950 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)
1 Sept 29.8 °C 55 % 42 km/h 0.0 mm High 23
2 Sept 31.9 °C 47 % 30 km/h 0.0 mm High 23
3 Sept 33.8 °C 42 % 35 km/h 0.0 mm High 27
4 Sept 33.9 °C 43 % 33 km/h 0.0 mm High 27
5 Sept 31.7 °C 47 % 32 km/h 0.0 mm High 28
6 Sept 33.7 °C 42 % 31 km/h 0.0 mm High 28
7 Sept 33.3 °C 43 % 32 km/h 0.0 mm High 28
8 Sept 32.9 °C 47 % 37 km/h 0.0 mm High 30
9 Sept 32.5 °C 44 % 30 km/h 0.0 mm High 28
10 Sept 33.3 °C 41 % 34 km/h 0.0 mm High 30
11 Sept 32.2 °C 38 % 39 km/h 0.0 mm High 31
12 Sept 32.2 °C 40 % 34 km/h 0.0 mm High 30
13 Sept 31.0 °C 44 % 36 km/h 0.0 mm High 30
14 Sept 30.0 °C 52 % 44 km/h 0.0 mm High 29
15 Sept 31.3 °C 45 % 40 km/h 0.0 mm High 28
16 Sept after 30.1 °C 50 % 33 km/h 0.0 mm High 26
17 Sept after 32.9 °C 41 % 40 km/h 0.0 mm High 30
18 Sept after 31.6 °C 47 % 44 km/h 0.0 mm High 32
19 Sept after 30.1 °C 50 % 48 km/h 0.0 mm High 32
20 Sept after 30.7 °C 50 % 36 km/h 0.0 mm High 28
21 Sept after 32.0 °C 47 % 30 km/h 0.0 mm High 27
22 Sept after 31.0 °C 52 % 32 km/h 0.0 mm High 27
23 Sept after 31.6 °C 50 % 37 km/h 0.0 mm High 28
24 Sept after 32.3 °C 47 % 34 km/h 0.0 mm High 28
25 Sept after 34.3 °C 39 % 36 km/h 0.1 mm High 29

Before and after, from space

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

Before · 25 Aug 2026
After · 22 Sept 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 13 September 2026 the air beside the fire reached 157 µg/m³ of PM2.5. That day averaged 76: 5.1 times the WHO daily guideline (15).

PM2.5 peak157 µg/m³
Days over the guideline17 days
PM10163 µg/m³
Optical depth3.48
3031123456789101112131415161718
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)

Other fires nearby

All fires in Indonesia ›

Frequently asked questions

How long did the Mappi fire last?
GWIS (Copernicus) dates it between 1 September 2026 and 15 September 2026: 15 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 1,933 hectares (19.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Mappi (1,950 ha, 0.1 %).
What was the weather like?
During the fire the temperature reached 33.9 °C, humidity dropped to 38 % and gusts hit 44 km/h. The fire danger index (FWI) reached 31, 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.