Ngoi fire, March 2021 Ngoi, Nambak
The fire started on 23 March 2021 in Ngoi, Laos, and satellites saw it burning for 12 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,202 hectares from heat detections, spread across 2 municipalities.
It is the 241th largest in Luang Prabang since 2016 (of 293 with a page). Number 63 in Laos in 2021, of 86.
- Burnt area
- 2,202ha
- GWIS perimeter (Copernicus)
- Duration
- 12days
- 23 Mar 2021 – 3 Apr 2021
- Municipalities hit
- 2
- districts
- Started on
- 23 Mar
- 2021
- Heat detections
- 80
- in a single hotspot: 111 MW
- Energy released
- 1.8GW
- 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.
This area had burned before
94% of the perimeter overlaps earlier fires recorded since 2016: 38 ha in 2016, 985 ha in 2017, 1,297 ha in 2018, 851 ha in 2019, 602 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 2,059 ha that had burned before.
- 1,297 ha Nambak fire, April 2018 10,440 ha in total; the hectares shown are those it shares with this fire
- 420 ha Nambak fire, April 2019 5,697 ha in total; the hectares shown are those it shares with this fire
- 84 ha Ngoi fire, April 2017 2,107 ha in total; the hectares shown are those it shares with this fire
- 5 ha Ngoi fire, March 2020 2,019 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Ngoi where it started1,263 ha reached on 23 Mar0.6 %
-
948 ha reached on 24 Mar0.5 %
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.
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 · 80Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 56,191 haPark Ou22 March 2026 · 32 days · 6 km away
- 15,019 haNgoi25 March 2023 · 32 days · 17 km away
- 35,409 haPark Ou9 March 2020 · 29 days · 19 km away
- 14,236 haPark Ou26 March 2024 · 21 days · 26 km away
- 13,537 haNambak24 March 2026 · 21 days · 30 km away
- 30,865 haPak XengMarch 2023 · 26 days · 38 km away
Frequently asked questions
- How long did the Ngoi fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 23 March 2021 to 3 April 2021 (12 days). The perimeter dates it from 30 March 2021 to 3 April 2021.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,202 hectares (22.0 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Ngoi (1,263 ha, 0.6 %); Nambak (948 ha, 0.5 %).
- 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
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.