Phoukhoune fire, 19 March 2026 Phoukhoune
The fire started on 19 March 2026 in Phoukhoune, Laos, and satellites saw it burning for 21 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 13,478 hectares from heat detections, spread across a single municipality.
It is the 11th largest in Luang Prabang since 2016 (of 295 with a page). Number 26 in Laos in 2026, of 308.
Compare with…
- Burnt area
- 13,478ha
- GWIS perimeter (Copernicus)
- Duration
- 21days
- 19 Mar 2026 – 8 Apr 2026
- Municipalities hit
- 1
- districts
- Started on
- 19 Mar
- 2026
- Heat detections
- 382
- in a single hotspot: 201 MW
- Danger at start
- 5
- Very low · FWI index
- Average daily power
- 422MW
- detected power per day, on average
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 3 days without rain (1 mm or more) when it started.
This area had burned before
66% of the perimeter overlaps earlier fires recorded since 2016: 2,628 ha in 2017, 1,177 ha in 2019, 1,025 ha in 2020, 1,416 ha in 2022, 2,601 ha in 2023, 1,600 ha in 2024, 4,765 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 8,944 ha that had burned before.
- 3,443 ha Phoukhoune fire, March 2025 5,298 ha in total; the hectares shown are those it shares with this fire
- 1,416 ha Phoukhoune fire, February 2022 3,687 ha in total; the hectares shown are those it shares with this fire
- 1,313 ha Phoukhoune fire, March 2017 2,145 ha in total; the hectares shown are those it shares with this fire
- 841 ha Phoukhoune fire, March 2019 2,415 ha in total; the hectares shown are those it shares with this fire
- 291 ha Phoukhoune fire, March 2023 4,102 ha in total; the hectares shown are those it shares with this fire
- 210 ha Phoukhoune fire, March 2020 4,338 ha in total; the hectares shown are those it shares with this fire
- 119 ha Phoukhoune fire, March 2025 2,262 ha in total; the hectares shown are those it shares with this fire
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Phoukhoune where it started13,542 ha reached on 19 Mar8.1 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
People and buildings inside the perimeter
GHSL 2025Inside the perimeter there were about 1.9 hectares of built-up land and about 1,500 residents (GHSL 2025, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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 Mar | 27.6 °C | 53 % | 29 km/h | 0.4 mm | Very low 5 |
| 22 Mar | 26.1 °C | 62 % | 44 km/h | 4.6 mm | Very low 0 |
| 23 Mar | 28.8 °C | 41 % | 36 km/h | 0.6 mm | Very low 3 |
| 24 Mar | 29.4 °C | 40 % | 32 km/h | 0.0 mm | Low 6 |
| 25 Mar | 28.0 °C | 57 % | 36 km/h | 1.5 mm | Very low 2 |
| 26 Mar | 29.9 °C | 40 % | 36 km/h | 0.0 mm | Low 7 |
| 27 Mar | 29.9 °C | 40 % | 40 km/h | 0.0 mm | Low 10 |
| 28 Mar | 30.0 °C | 42 % | 38 km/h | 0.1 mm | Low 10 |
| 29 Mar | 29.0 °C | 46 % | 49 km/h | 2.7 mm | Very low 3 |
| 30 Mar | 29.1 °C | 42 % | 42 km/h | 0.0 mm | Low 8 |
| 31 Mar | 28.9 °C | 43 % | 36 km/h | 0.0 mm | Low 9 |
| 1 Apr | 29.4 °C | 44 % | 32 km/h | 0.0 mm | Low 10 |
| 2 Apr | 28.6 °C | 51 % | 41 km/h | 0.0 mm | Moderate 12 |
| 3 Apr | 29.7 °C | 45 % | 37 km/h | 0.0 mm | Moderate 12 |
| 4 Apr | 28.6 °C | 47 % | 37 km/h | 0.0 mm | Moderate 12 |
| 5 Apr | 28.9 °C | 49 % | 42 km/h | 0.1 mm | Moderate 13 |
| 6 Apr | 30.0 °C | 47 % | 39 km/h | 0.0 mm | Moderate 13 |
| 7 Apr | 30.6 °C | 44 % | 35 km/h | 0.0 mm | Moderate 14 |
| 8 Apr | 32.3 °C | 30 % | 40 km/h | 0.0 mm | Moderate 19 |
| 9 Apr after | 32.1 °C | 31 % | 41 km/h | 0.0 mm | Moderate 20 |
| 10 Apr after | 31.4 °C | 31 % | 42 km/h | 0.0 mm | Moderate 21 |
| 11 Apr after | 31.1 °C | 34 % | 46 km/h | 0.0 mm | High 23 |
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.
The smoke
CAMS · CopernicusOn 11 April 2026 the air beside the fire reached 196 µg/m³ of PM2.5. That day averaged 138: 9.2 times the WHO daily guideline (15).
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 · 382Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 23,475 haPhookood17 March 2026 · 37 days · 16 km away
- 23,349 haPhoukhoune20 March 2026 · 28 days · 16 km away
- 6,009 haPhoukhoune16 March 2023 · 20 days · 18 km away
- 8,774 haPhookood20 March 2017 · 9 days · 25 km away
- 6,178 haPhookood21 March 2025 · 10 days · 31 km away
- 8,745 haVangviengMarch 2026 · 30 days · 36 km away
Frequently asked questions
- How long did the Phoukhoune fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 19 March 2026 to 8 April 2026 (21 days). The perimeter dates it from 21 March 2026 to 1 April 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 13,478 hectares (134.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Phoukhoune (13,542 ha, 8.1 %).
- What was the weather like?
- During the fire the temperature reached 30.0 °C, humidity dropped to 40 % and gusts hit 49 km/h. The fire danger index (FWI) reached 10, class Low.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Laos (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
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 21 March 2026 to 1 April 2026. 382 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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.