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MM · Myanmar (Burma) · →

Ann fire, 5 April 2023 Ann

Out · last detection 11 Apr 2023, 19:03 UTC

The fire started on 5 April 2023 in Ann, Myanmar (Burma), and satellites saw it burning for 7 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,728 hectares from heat detections, spread across a single municipality.

It is the 32th largest in Rakhine since 2016 (of 56 with a page). Number 120 in Myanmar (Burma) in 2023, of 212.

Burnt area
2,728ha
GWIS perimeter (Copernicus)
Duration
7days
5 Apr 2023 – 11 Apr 2023
Municipalities hit
1
municipalities
Started on
5 Apr
2023
Heat detections
74
in a single hotspot: 259 MW
Danger at start
31
High · FWI index
Energy released
1.9GW
sum of detected power

Where it burned

11 Apr 2023
HOTSPOTS BY DAY 5 Apr11 Apr

How it evolved, day by day

7891011

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

The weather it burned in

41°high
45km/h · peak gust
27%lowest humidity

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

This area had burned before

19% of the perimeter overlaps earlier fires recorded since 2016: 153 ha in 2020, 508 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 515 ha that had burned before.

What happened to each town

  1. Ann where it started
    2,739 ha reached on 4 Apr
    0.4 %

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)
5 Apr 35.9 °C 45 % 45 km/h 0.0 mm High 31
6 Apr 37.2 °C 43 % 40 km/h 0.0 mm High 30
7 Apr 40.2 °C 33 % 40 km/h 0.0 mm High 36
8 Apr 40.8 °C 27 % 42 km/h 0.0 mm Very high 41
9 Apr 40.3 °C 30 % 42 km/h 0.0 mm Very high 42
10 Apr 40.0 °C 34 % 42 km/h 0.0 mm Very high 41
11 Apr 39.7 °C 36 % 37 km/h 0.0 mm Very high 38
12 Apr after 39.7 °C 36 % 43 km/h 0.0 mm Very high 42
13 Apr after 37.6 °C 42 % 41 km/h 0.0 mm High 36
14 Apr after 39.6 °C 39 % 38 km/h 0.0 mm High 34
15 Apr after 40.0 °C 40 % 42 km/h 0.0 mm High 36
16 Apr after 36.3 °C 55 % 41 km/h 0.0 mm High 28
17 Apr after 36.6 °C 59 % 36 km/h 0.0 mm High 25
18 Apr after 37.8 °C 47 % 37 km/h 0.3 mm High 26
19 Apr after 37.2 °C 54 % 37 km/h 0.3 mm High 27
20 Apr after 37.5 °C 50 % 39 km/h 0.6 mm High 25
21 Apr after 36.4 °C 59 % 42 km/h 0.9 mm Moderate 19

Before and after, from space

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

Before · 29 Mar 2023
After · 18 Apr 2023

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

Detections table · 74Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Myanmar (Burma) ›

Frequently asked questions

How long did the Ann fire last?
GWIS (Copernicus) dates it between 5 April 2023 and 11 April 2023: 7 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 2,728 hectares (27.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Ann (2,739 ha, 0.4 %).
What was the weather like?
During the fire the temperature reached 40.8 °C, humidity dropped to 27 % and gusts hit 45 km/h. The fire danger index (FWI) reached 42, class Very 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

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.