How long did the Mongnai fire last?

GWIS (Copernicus) dates it between 19 March 2026 and 2 April 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 10,360 hectares (103.6 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Mongnai (10,407 ha, 3.2 %).

What was the weather like?

During the fire the temperature reached 35.9 °C, humidity dropped to 22 % and gusts hit 49 km/h. The fire danger index (FWI) reached 37, class High.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Myanmar (Burma) (geoBoundaries). It is not an official report.

MM · Myanmar (Burma) · 2026-03-19 → 2026-04-02

Mongnai fire, 19 March 2026 Mongnai

Out · last detection 3 Apr 2026, 19:07 UTC

The fire started on 19 March 2026 in Mongnai, Myanmar (Burma), and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 10,360 hectares from heat detections, spread across a single municipality.

It is the 44th largest in Shan since 2016 (of 723 with a page). Number 40 in Myanmar (Burma) in 2026, of 418.

Burnt area: 10,360ha; GWIS perimeter (Copernicus)
Duration: 15days; 19 Mar 2026 – 2 Apr 2026
Municipalities hit: 1; municipalities
Started on: 19 Mar; 2026
Heat detections: 215; in a single hotspot: 35 MW
Danger at start: 23; High · FWI index
Energy released: 1.4GW; sum of detected power

Play back 3 Apr 2026

HOTSPOTS BY DAY 19 Mar2 Apr

How it evolved, day by day

202122232425262728293031123

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

49km/h · peak gust

22%lowest humidity

It had gone 3 days without rain (1 mm or more) when it started. Rain came after the fire: 6.5 mm on 7 Apr.

This area had burned before

21% of the perimeter overlaps earlier fires recorded since 2016: 2,189 ha in 2025.

What happened to each town

Mongnai where it started

10,407 ha reached on 20 Mar

3.2 %

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)
19 Mar	34.1 °C	25 %	24 km/h	0.2 mm	High 23
20 Mar	32.7 °C	28 %	17 km/h	0.0 mm	High 23
21 Mar	34.2 °C	33 %	38 km/h	0.9 mm	Moderate 21
22 Mar	32.0 °C	31 %	44 km/h	0.4 mm	High 26
23 Mar	33.5 °C	22 %	37 km/h	0.0 mm	High 29
24 Mar	33.8 °C	24 %	30 km/h	0.0 mm	High 29
25 Mar	34.8 °C	23 %	27 km/h	0.0 mm	High 28
26 Mar	35.0 °C	24 %	25 km/h	0.0 mm	High 28
27 Mar	34.8 °C	26 %	33 km/h	0.0 mm	High 32
28 Mar	35.7 °C	22 %	49 km/h	0.0 mm	High 37
29 Mar	35.0 °C	23 %	44 km/h	0.1 mm	High 36
30 Mar	35.8 °C	24 %	37 km/h	0.0 mm	High 34
31 Mar	35.5 °C	27 %	28 km/h	0.0 mm	High 32
1 Apr	35.9 °C	29 %	32 km/h	0.0 mm	High 34
2 Apr	35.8 °C	26 %	34 km/h	0.0 mm	High 36
3 Apr after	37.5 °C	24 %	28 km/h	0.0 mm	High 34
4 Apr after	36.9 °C	26 %	27 km/h	0.0 mm	High 34
5 Apr after	36.1 °C	32 %	30 km/h	0.0 mm	High 33
6 Apr after	35.4 °C	32 %	23 km/h	0.1 mm	High 31
7 Apr after	34.0 °C	38 %	37 km/h	6.5 mm	Low 7

Before and after, from space

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

↔

Before · 12 Mar 2026

After · 9 Apr 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 5 April 2026 the air beside the fire reached 78 µg/m³ of PM2.5. That day averaged 61: 4.1 times the WHO daily guideline (15).

PM2.5 peak78 µg/m³

Days over the guideline19 days

PM1099 µg/m³

Optical depth1.38

WHO 15

17181920212223242526272829303112345

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 · 215Every 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 Myanmar (Burma) ›

Frequently asked questions

How long did the Mongnai fire last?: GWIS (Copernicus) dates it between 19 March 2026 and 2 April 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 10,360 hectares (103.6 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Mongnai (10,407 ha, 3.2 %).
What was the weather like?: During the fire the temperature reached 35.9 °C, humidity dropped to 22 % and gusts hit 49 km/h. The fire danger index (FWI) reached 37, class High.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Myanmar (Burma) (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.

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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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 ADM3 (Creative Commons Attribution 4.0 (CC BY 4.0)). 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