Burned area
satellite only4,046ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 23 Mar 2026 – 14 Apr 2026
+− cross-check
No official record is matched to this page to compare it with.
LA · Laos · –
Park Ou fire, 23 March 2026 Park Ou, Nga
Out · last detection 15 Apr 2026, 18:43 UTC
The fire started on 23 March 2026 in Park Ou, Laos, and satellites saw it burning for 23 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,046 hectares from heat detections, spread across 2 municipalities.
Number 114 in Laos in 2026, of 308.
GWIS near-real-time perimeter, from the layer that changed in October 2025: this fire is not compared with fires from earlier years, because since then the GWIS layer gives more and larger perimeters.
Use this data
Compare with…
Suggestions: Park Ou · 2019Park Ou · 2022Nga · 2018Nga · 2024
Use this data
Fire page data · version 2026-10-24matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only23days
23 Mar 2026 to 14 Apr 2026: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 15 Apr 2026, 18:43 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only23 Mar 2026
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 23 Mar 2026
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only101
VIIRS detections at 375 m. Most intense hotspot: 209 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 23 Mar 2026 – 14 Apr 2026
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only533MW
Total radiative power on 2 April 2026; hotspots that day: 11.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 2 Apr 2026
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model14.8FWI · moderate
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 9.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 23 Mar 2026, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model35.3°C · 32% RH
High of 35.3 °C and minimum humidity of 32% on 13 April 2026; gusts of 50 km/h on 29 March 2026.
- Source
- weather model at the fire’s grid cell
- Date
- 23 Mar 2026 – 14 Apr 2026
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
Living inside
model≈ 1,200people
Estimated residents inside the perimeter and 2.6 ha of built-up area (100 m grid, epoch 2025).
- Source
- GHSL R2023A · JRC
- Date
- calculated on 24 October 2026
+− cross-check
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.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed GHSLPopulation and built-up area computed
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
What was saved on 24 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 4,046 ha
- Dates
- 23 Mar 2026 – 14 Apr 2026
- Name
- Park Ou
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/park-ou-2026-03-4?v=2026-10-24A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire park-ou-2026-03-4.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-03-23 | 1 | 8 | 32.6 | 18.4 | 33 | 10.6 | 34.6 | 0 | 14.8 | moderado | 1 |
| 2026-03-24 | 2 | 33 | 33.1 | 17.2 | 30 | 9.5 | 31.3 | 0 | 16.3 | moderado | 1 |
| 2026-03-25 | 5 | 202 | 32.1 | 17.4 | 37 | 11.6 | 37.4 | 0 | 18 | moderado | 1 |
| 2026-03-26 | 0 | 0 | 33.7 | 17.3 | 32 | 11.1 | 35.3 | 0 | 18.5 | moderado | 1 |
| 2026-03-27 | 4 | 42 | 33.3 | 16.1 | 34 | 11.7 | 39.2 | 0 | 19.5 | moderado | 1 |
| 2026-03-28 | 9 | 104 | 33.9 | 16.9 | 31 | 11.2 | 35.6 | 0 | 20 | moderado | 1 |
| 2026-03-29 | 0 | 0 | 31.9 | 18.4 | 38 | 15.1 | 50 | 0.4 | 22.3 | alto | 1 |
| 2026-03-30 | 2 | 6 | 33 | 17.8 | 35 | 12.3 | 41 | 0 | 21.3 | alto | 1 |
| 2026-03-31 | 8 | 142 | 33.2 | 18.7 | 35 | 10.4 | 34.9 | 0 | 20.9 | moderado | 1 |
| 2026-04-01 | 16 | 181 | 32.7 | 18.9 | 40 | 9.2 | 29.9 | 0.1 | 20.2 | moderado | 1 |
| 2026-04-02 | 11 | 533 | 32.3 | 19.5 | 43 | 13.2 | 43.2 | 0 | 21.7 | alto | 1 |
| 2026-04-03 | 7 | 191 | 34.9 | 19.2 | 34 | 11.2 | 36.7 | 0 | 22 | alto | 1 |
| 2026-04-04 | 0 | 0 | 34.3 | 19.3 | 36 | 10.6 | 32.8 | 0 | 22.3 | alto | 1 |
| 2026-04-05 | 6 | 147 | 33.3 | 21.3 | 40 | 12.6 | 41 | 0 | 24.1 | alto | 1 |
| 2026-04-06 | 1 | 4 | 33.7 | 22.1 | 41 | 11.1 | 35.6 | 0 | 23.8 | alto | 1 |
| 2026-04-07 | 5 | 36 | 34 | 20.9 | 38 | 10.9 | 35.3 | 0.1 | 24.3 | alto | 1 |
| 2026-04-08 | 4 | 16 | 34.5 | 20.7 | 35 | 12 | 36 | 0 | 25.6 | alto | 1 |
| 2026-04-09 | 6 | 6 | 34.3 | 19.6 | 32 | 12.3 | 42.5 | 0 | 26.4 | alto | 1 |
| 2026-04-10 | 4 | 16 | 34.1 | 17.9 | 31 | 13.4 | 42.1 | 0 | 28.1 | alto | 1 |
| 2026-04-11 | 2 | 7 | 33.8 | 18.6 | 34 | 14.8 | 44.3 | 0 | 29.6 | alto | 1 |
| 2026-04-12 | 1 | 2 | 34.4 | 18.5 | 26 | 10.2 | 32 | 0 | 29.2 | alto | 1 |
| 2026-04-13 | 2 | 4 | 35.3 | 18.1 | 32 | 10.5 | 30.2 | 0 | 30 | alto | 1 |
| 2026-04-14 | 4 | 6 | 33.8 | 18.9 | 38 | 9.8 | 33.8 | 0 | 28.1 | alto | 1 |
| 2026-04-15 | 1 | 2 | 34.1 | 19.6 | 37 | 11.6 | 37.1 | 0 | 29.9 | alto | 0 |
| 2026-04-16 | 0 | 0 | 35.4 | 18.7 | 27 | 8.1 | 29.9 | 0 | 29.1 | alto | 0 |
| 2026-04-17 | 0 | 0 | 35.3 | 20.4 | 33 | 8.7 | 26.3 | 0 | 30 | alto | 0 |
| 2026-04-18 | 0 | 0 | 31.1 | 19.6 | 49 | 7.3 | 25.2 | 0 | 22.5 | alto | 0 |
| 2026-04-19 | 0 | 0 | 29.5 | 19.8 | 64 | 10 | 37.4 | 3.2 | 4.7 | muy_bajo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 4,046ha
- GWIS perimeter (Copernicus)
- Duration
- 23days
- 23 Mar 2026 – 14 Apr 2026
- Municipalities hit
- 2
- districts
- Started on
- 23 Mar
- 2026
- Heat detections
- 101
- in a single hotspot: 209 MW
- Danger at start
- 15
- Moderate · FWI index
- Average daily power
- 80MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
23 Mar14 Apr
15 Apr 2026
How it evolved, day by day
23 Mar
2 Apr
10 Apr
15 Apr
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
35°high
50km/h · peak gust
26%lowest humidity
It had gone 9 days without rain (1 mm or more) when it started. Rain came after the fire: 3.2 mm on 19 Apr.
This area had burned before
93% of the perimeter overlaps earlier fires recorded since 2016: 2,641 ha in 2016, 1,465 ha in 2017, 2,388 ha in 2018, 3,968 ha in 2019, 1,841 ha in 2020, 2,577 ha in 2022, 1,140 ha in 2023, 2,529 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 3,748 ha that had burned before.
- 3,124 ha Park Ou fire, March 2019 4,347 ha in total; the hectares shown are those it shares with this fire
- 2,577 ha Park Ou fire, April 2022 5,126 ha in total; the hectares shown are those it shares with this fire
- 2,388 ha Nga fire, April 2018 40,733 ha in total; the hectares shown are those it shares with this fire
- 2,331 ha Nga fire, March 2024 7,619 ha in total; the hectares shown are those it shares with this fire
- 1,424 ha Park Ou fire, April 2017 3,336 ha in total; the hectares shown are those it shares with this fire
- 911 ha Nga fire, March 2023 6,374 ha in total; the hectares shown are those it shares with this fire
- 744 ha Park Ou fire, March 2020 10,480 ha in total; the hectares shown are those it shares with this fire
- 219 ha Park Ou fire, March 2023 2,501 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
-
Park Ou where it started2,822 ha reached on 23 Mar3.2 %
-
1,246 ha reached on 25 Mar0.6 %
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 2025Built-up area2.6 ha
Residents≈ 1,200
Inside the perimeter there were about 2.6 hectares of built-up land and about 1,200 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) |
|---|---|---|---|---|---|
| 23 Mar | 32.6 °C | 33 % | 35 km/h | 0.0 mm | Moderate 15 |
| 24 Mar | 33.1 °C | 30 % | 31 km/h | 0.0 mm | Moderate 16 |
| 25 Mar | 32.1 °C | 37 % | 37 km/h | 0.0 mm | Moderate 18 |
| 26 Mar | 33.7 °C | 32 % | 35 km/h | 0.0 mm | Moderate 18 |
| 27 Mar | 33.3 °C | 34 % | 39 km/h | 0.0 mm | Moderate 20 |
| 28 Mar | 33.9 °C | 31 % | 36 km/h | 0.0 mm | Moderate 20 |
| 29 Mar | 31.9 °C | 38 % | 50 km/h | 0.4 mm | High 22 |
| 30 Mar | 33.0 °C | 35 % | 41 km/h | 0.0 mm | High 21 |
| 31 Mar | 33.2 °C | 35 % | 35 km/h | 0.0 mm | Moderate 21 |
| 1 Apr | 32.7 °C | 40 % | 30 km/h | 0.1 mm | Moderate 20 |
| 2 Apr | 32.3 °C | 43 % | 43 km/h | 0.0 mm | High 22 |
| 3 Apr | 34.9 °C | 34 % | 37 km/h | 0.0 mm | High 22 |
| 4 Apr | 34.3 °C | 36 % | 33 km/h | 0.0 mm | High 22 |
| 5 Apr | 33.3 °C | 40 % | 41 km/h | 0.0 mm | High 24 |
| 6 Apr | 33.7 °C | 41 % | 36 km/h | 0.0 mm | High 24 |
| 7 Apr | 34.0 °C | 38 % | 35 km/h | 0.1 mm | High 24 |
| 8 Apr | 34.5 °C | 35 % | 36 km/h | 0.0 mm | High 26 |
| 9 Apr | 34.3 °C | 32 % | 42 km/h | 0.0 mm | High 26 |
| 10 Apr | 34.1 °C | 31 % | 42 km/h | 0.0 mm | High 28 |
| 11 Apr | 33.8 °C | 34 % | 44 km/h | 0.0 mm | High 30 |
| 12 Apr | 34.4 °C | 26 % | 32 km/h | 0.0 mm | High 29 |
| 13 Apr | 35.3 °C | 32 % | 30 km/h | 0.0 mm | High 30 |
| 14 Apr | 33.8 °C | 38 % | 34 km/h | 0.0 mm | High 28 |
| 15 Apr after | 34.1 °C | 37 % | 37 km/h | 0.0 mm | High 30 |
| 16 Apr after | 35.4 °C | 27 % | 30 km/h | 0.0 mm | High 29 |
| 17 Apr after | 35.3 °C | 33 % | 26 km/h | 0.0 mm | High 30 |
| 18 Apr after | 31.1 °C | 49 % | 25 km/h | 0.0 mm | High 22 |
| 19 Apr after | 29.5 °C | 64 % | 37 km/h | 3.2 mm | Very low 5 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 16 Mar 2026
After · 21 Apr 2026
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 14 April 2026 the air beside the fire reached 213 µg/m³ of PM2.5. That day averaged 123: 8.2 times the WHO daily guideline (15).
PM2.5 peak213 µg/m³
Days over the guideline28 days
PM10231 µg/m³
Optical depth2.63
WHO 15
21 Mar27 Mar2 Apr8 Apr14 Apr
Good
Fair
Moderate
Poor
Very poor
Extremely poor
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 · 101Every 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 time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 40,733 haNga3 April 2018 · 12 days · 10 km away
- 14,195 haPark Ou26 March 2024 · 21 days · 24 km away
- 35,012 haPark Ou9 March 2020 · 31 days · 27 km away
- 13,537 haNambak24 March 2026 · 21 days · 27 km away
- 55,314 haPark Ou22 March 2026 · 32 days · 30 km away
- 30,678 haPak XengMarch 2023 · 26 days · 34 km away
Frequently asked questions
- How long did the Park Ou fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 23 March 2026 to 14 April 2026 (23 days). The perimeter dates it from 28 March 2026 to 7 April 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,046 hectares (40.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Park Ou (2,822 ha, 3.2 %); Nga (1,246 ha, 0.6 %).
- What was the weather like?
- During the fire the temperature reached 35.3 °C, humidity dropped to 26 % and gusts hit 50 km/h. The fire danger index (FWI) reached 30, class High.
- 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.
RSS Changes to this page With cross-checks and a citable version
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 28 March 2026 to 7 April 2026. 101 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.