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Mae Ai fire, 10 April 2016 Mae Ai

Out · last detection 15 Apr 2016, 18:10 UTC

The fire started on 10 April 2016 in Mae Ai, Thailand, and satellites saw it burning for 5 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,299 hectares from heat detections, spread across a single municipality.

It is the 303th largest in Chiang Mai Province since 2016 (of 463 with a page). Number 331 in Thailand in 2016, of 527.

The power measured by the satellite is low (19.3 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
1,299ha
GWIS perimeter (Copernicus)
Duration
5days
10 Apr 2016 – 14 Apr 2016
Municipalities hit
1
districts
Started on
10 Apr
2016
Heat detections
45
in a single hotspot: 19 MW
Danger at start
36
High · FWI index
Energy released
120MW
sum of detected power

Where it burned

15 Apr 2016
HOTSPOTS BY DAY 10 Apr14 Apr

How it evolved, day by day

101112131415

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

The weather it burned in

39°high
42km/h · peak gust
22%lowest humidity

It had gone 36 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. Mae Ai where it started
    1,306 ha reached on 4 Apr
    1.6 %

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)
4 Apr 35.5 °C 26 % 33 km/h 0.0 mm High 36
5 Apr 36.6 °C 23 % 39 km/h 0.0 mm Very high 38
6 Apr 35.4 °C 32 % 36 km/h 0.0 mm High 35
7 Apr 36.2 °C 26 % 26 km/h 0.0 mm High 33
8 Apr 35.2 °C 31 % 31 km/h 0.0 mm High 35
9 Apr 35.5 °C 34 % 34 km/h 1.0 mm High 26
10 Apr 36.9 °C 28 % 42 km/h 0.0 mm High 36
11 Apr 38.7 °C 22 % 37 km/h 0.0 mm Very high 39
12 Apr 37.4 °C 24 % 40 km/h 0.0 mm Very high 42
13 Apr 36.5 °C 26 % 40 km/h 0.0 mm Very high 42
14 Apr 37.7 °C 27 % 36 km/h 0.2 mm Very high 40
15 Apr after 38.1 °C 22 % 38 km/h 0.0 mm Very high 41
16 Apr after 38.4 °C 21 % 38 km/h 0.0 mm Very high 42
17 Apr after 38.1 °C 23 % 32 km/h 0.0 mm Very high 40
18 Apr after 37.8 °C 30 % 31 km/h 0.0 mm Very high 38
19 Apr after 37.1 °C 29 % 38 km/h 0.0 mm Very high 42
20 Apr after 38.1 °C 22 % 43 km/h 0.0 mm Very high 42
21 Apr after 37.8 °C 25 % 41 km/h 0.0 mm Very high 44
22 Apr after 34.9 °C 32 % 52 km/h 0.6 mm High 36
23 Apr after 37.4 °C 28 % 44 km/h 0.0 mm High 38
24 Apr after 36.6 °C 31 % 40 km/h 0.0 mm High 37

Before and after, from space

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

Before · 3 Apr 2016
After · 21 Apr 2016

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 · 45Every 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 Thailand ›

Frequently asked questions

How long did the Mae Ai fire last?
GWIS (Copernicus) dates it between 10 April 2016 and 14 April 2016: 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 1,299 hectares (13.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Mae Ai (1,306 ha, 1.6 %).
What was the weather like?
During the fire the temperature reached 38.7 °C, humidity dropped to 22 % and gusts hit 42 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 Thailand (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: 199 · 191

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 199 · 191.

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.