How long did the Mappi fire last?

GWIS (Copernicus) dates it between 22 July 2026 and 27 July 2026: 6 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 1,656 hectares (16.6 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Mappi (1,668 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 33.0 °C, humidity dropped to 31 % and gusts hit 12 km/h. The fire danger index (FWI) reached 19, 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 · 2026-07-22 → 2026-07-27

Mappi fire, 22 July 2026 Mappi

Out · last detection 27 Jul 2026, 03:55 UTC

The fire started on 22 July 2026 in Mappi, Indonesia, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,656 hectares from heat detections, spread across a single municipality.

It is the 300th largest in Papua since 2016 (of 363 with a page). Number 857 in Indonesia in 2026, of 1005.

The power measured by the satellite is low (28.4 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.

Burnt area: 1,656ha; GWIS perimeter (Copernicus)
Duration: 6days; 22 Jul 2026 – 27 Jul 2026
Municipalities hit: 1; regencies
Started on: 22 Jul; 2026
Heat detections: 26; in a single hotspot: 28 MW
Danger at start: 10; Low · FWI index
Energy released: 219MW; sum of detected power

Play back 27 Jul 2026

HOTSPOTS BY DAY 22 Jul27 Jul

How it evolved, day by day

22252627

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

The weather it burned in

33°high

12km/h · peak gust

31%lowest humidity

It had gone 2 days without rain (1 mm or more) when it started.

This area had burned before

10% of the perimeter overlaps earlier fires recorded since 2016: 170 ha in 2023.

What happened to each town

Mappi where it started

1,668 ha reached on 21 Jul

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)
21 Jul	30.5 °C	47 %	10 km/h	0.0 mm	Low 10
22 Jul	31.4 °C	42 %	10 km/h	0.0 mm	Moderate 12
23 Jul	32.5 °C	38 %	10 km/h	0.0 mm	Moderate 14
24 Jul	32.5 °C	31 %	10 km/h	0.0 mm	Moderate 17
25 Jul	32.5 °C	35 %	11 km/h	0.0 mm	Moderate 18
26 Jul	33.0 °C	37 %	12 km/h	0.0 mm	Moderate 19
27 Jul	33.0 °C	37 %	10 km/h	0.0 mm	Moderate 19
28 Jul after	31.5 °C	48 %	27 km/h	0.0 mm	Moderate 18
29 Jul after	30.7 °C	51 %	30 km/h	0.0 mm	Moderate 17
30 Jul after	31.2 °C	48 %	33 km/h	0.0 mm	Moderate 19
31 Jul after	31.1 °C	46 %	43 km/h	0.1 mm	High 22
1 Aug after	29.2 °C	56 %	42 km/h	0.0 mm	Moderate 20
2 Aug after	31.0 °C	51 %	33 km/h	0.0 mm	Moderate 18
3 Aug after	31.2 °C	47 %	42 km/h	0.0 mm	Moderate 20
4 Aug after	30.7 °C	46 %	31 km/h	0.0 mm	Moderate 18
5 Aug after	30.6 °C	48 %	33 km/h	0.0 mm	Moderate 19
6 Aug after	27.9 °C	62 %	28 km/h	0.0 mm	Moderate 15

Before and after, from space

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

↔

Before · 15 Jul 2026

After · 3 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 26 July 2026 the air beside the fire reached 125 µg/m³ of PM2.5. That day averaged 73: 4.9 times the WHO daily guideline (15).

PM2.5 peak125 µg/m³

Days over the guideline10 days

PM10127 µg/m³

Optical depth0.96

WHO 15

192021222324252627282930

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 · 26Every 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 22 July 2026 and 27 July 2026: 6 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 1,656 hectares (16.6 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Mappi (1,668 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 33.0 °C, humidity dropped to 31 % and gusts hit 12 km/h. The fire danger index (FWI) reached 19, 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

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.

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What really happened?

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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.

Where it burned