Hot fire, 11 March 2017 Hot, Li
The fire started on 11 March 2017 in Hot, Thailand, and satellites saw it burning for 7 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,482 hectares from heat detections, spread across 2 municipalities.
It is the 107th largest in Chiang Mai Province since 2016 (of 463 with a page). Number 45 in Thailand in 2017, of 240.
The power measured by the satellite is low (27.9 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
- 2,482ha
- GWIS perimeter (Copernicus)
- Duration
- 7days
- 11 Mar 2017 – 17 Mar 2017
- Municipalities hit
- 2
- districts
- Started on
- 11 Mar
- 2017
- Heat detections
- 93
- in a single hotspot: 28 MW
- Danger at start
- 27
- High · FWI index
- Energy released
- 364MW
- sum of detected power
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 50 days without rain (1 mm or more) when it started.
This area had burned before
29% of the perimeter overlaps earlier fires recorded since 2016: 712 ha in 2016.
What happened to each town
-
Hot where it started2,248 ha reached on 4 Mar1.5 %
-
247 ha reached on 4 Mar0.1 %
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) |
|---|---|---|---|---|---|
| 4 Mar | 35.1 °C | 27 % | 30 km/h | 0.0 mm | High 27 |
| 5 Mar | 35.2 °C | 25 % | 25 km/h | 0.0 mm | High 29 |
| 6 Mar | 35.7 °C | 25 % | 23 km/h | 0.0 mm | High 31 |
| 7 Mar | 35.6 °C | 23 % | 24 km/h | 0.0 mm | High 32 |
| 8 Mar | 35.6 °C | 29 % | 25 km/h | 0.0 mm | High 31 |
| 9 Mar | 34.4 °C | 29 % | 38 km/h | 0.0 mm | High 36 |
| 10 Mar | 34.5 °C | 33 % | 36 km/h | 0.0 mm | High 33 |
| 11 Mar | 35.7 °C | 32 % | 31 km/h | 0.0 mm | High 33 |
| 12 Mar | 36.6 °C | 25 % | 41 km/h | 0.0 mm | High 37 |
| 13 Mar | 36.2 °C | 21 % | 35 km/h | 0.0 mm | High 37 |
| 14 Mar | 36.4 °C | 27 % | 28 km/h | 0.0 mm | High 36 |
| 15 Mar | 36.7 °C | 17 % | 31 km/h | 0.0 mm | Very high 40 |
| 16 Mar | 37.3 °C | 23 % | 39 km/h | 0.0 mm | Very high 44 |
| 17 Mar | 35.9 °C | 26 % | 39 km/h | 0.0 mm | Very high 42 |
| 18 Mar after | 35.9 °C | 26 % | 38 km/h | 0.0 mm | Very high 41 |
| 19 Mar after | 36.3 °C | 23 % | 33 km/h | 0.0 mm | Very high 40 |
| 20 Mar after | 36.3 °C | 23 % | 30 km/h | 0.0 mm | Very high 40 |
| 21 Mar after | 34.9 °C | 27 % | 41 km/h | 0.0 mm | Very high 43 |
| 22 Mar after | 35.8 °C | 24 % | 20 km/h | 0.0 mm | High 36 |
| 23 Mar after | 37.0 °C | 26 % | 27 km/h | 0.0 mm | High 36 |
| 24 Mar after | 37.3 °C | 28 % | 34 km/h | 0.0 mm | Very high 39 |
| 25 Mar after | 37.5 °C | 25 % | 28 km/h | 0.0 mm | High 38 |
| 26 Mar after | 39.7 °C | 15 % | 37 km/h | 0.0 mm | Very high 45 |
| 27 Mar after | 32.1 °C | 46 % | 39 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.
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 · 93Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Hot fire last?
- GWIS (Copernicus) dates it between 11 March 2017 and 17 March 2017: 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 2,482 hectares (24.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Hot (2,248 ha, 1.5 %); Li (247 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 37.3 °C, humidity dropped to 17 % and gusts hit 41 km/h. The fire danger index (FWI) reached 44, 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
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.