Pha Oudom fire, 29 March 2026 Pha Oudom
The fire started on 29 March 2026 in Pha Oudom, Laos, and satellites saw it burning for 19 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,153 hectares from heat detections, spread across a single municipality.
It is the 63th largest in Bokeo since 2016 (of 73 with a page). Number 273 in Laos in 2026, of 308.
Compare with…
- Burnt area
- 2,153ha
- GWIS perimeter (Copernicus)
- Duration
- 19days
- 29 Mar 2026 – 16 Apr 2026
- Municipalities hit
- 1
- districts
- Started on
- 29 Mar
- 2026
- Heat detections
- 47
- in a single hotspot: 166 MW
- Average daily power
- 118MW
- 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.
This area had burned before
99% of the perimeter overlaps earlier fires recorded since 2016: 2,762 ha in 2016, 1,765 ha in 2017, 1,511 ha in 2020, 16 ha in 2021, 1,616 ha in 2023, 701 ha in 2024, 134 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 2,141 ha that had burned before.
- 1,765 ha Pha Oudom fire, April 2017 4,557 ha in total; the hectares shown are those it shares with this fire
- 1,616 ha Pha Oudom fire, March 2023 5,955 ha in total; the hectares shown are those it shares with this fire
- 1,504 ha Pha Oudom fire, April 2016 6,153 ha in total; the hectares shown are those it shares with this fire
- 942 ha Pha Oudom fire, March 2020 4,067 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
-
Pha Oudom where it started2,164 ha reached on 30 Mar1.3 %
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.
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 18 April 2026 the air beside the fire reached 237 µg/m³ of PM2.5. That day averaged 174: 12 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 · 47Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 10,788 haPha Oudom13 March 2020 · 29 days · 14 km away
- 10,361 haPha Oudom21 March 2020 · 23 days · 29 km away
- 11,424 haPha Oudom21 March 2019 · 13 days · 32 km away
- 28,618 haKhop19 March 2023 · 31 days · 36 km away
- 12,680 haPakthaMarch 2019 · 33 days · 36 km away
- 12,675 haXienghone3 April 2026 · 19 days · 40 km away
Frequently asked questions
- How long did the Pha Oudom fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 29 March 2026 to 16 April 2026 (19 days). The perimeter dates it from 5 April 2026 to 13 April 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,153 hectares (21.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Pha Oudom (2,164 ha, 1.3 %).
- 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.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 5 April 2026 to 13 April 2026. 47 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
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.