Nong fire, March 2023 Nong
The fire started on 14 March 2023 in Nong, Laos, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,582 hectares from heat detections, spread across a single municipality.
It is the 54th largest in Savannakhet since 2016 (of 95 with a page). Number 143 in Laos in 2023, of 239.
Compare with…
Suggestions: Nong · 2019Nong · 2017Nong · 2020Nong · 2018
- Burnt area
- 2,582ha
- GWIS perimeter (Copernicus)
- Duration
- 18days
- 14 Mar 2023 – 31 Mar 2023
- Municipalities hit
- 1
- districts
- Started on
- 14 Mar
- 2023
- Heat detections
- 116
- in a single hotspot: 142 MW
- Danger at start
- 19
- Moderate · FWI index
- Average daily power
- 116MW
- 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 37 days without rain (1 mm or more) when it started. Rain came after the fire: 4.6 mm on 2 Apr.
This area had burned before
97% of the perimeter overlaps earlier fires recorded since 2016: 543 ha in 2016, 871 ha in 2017, 835 ha in 2018, 1,839 ha in 2019, 1,274 ha in 2020, 367 ha in 2021, 795 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 2,500 ha that had burned before.
- 1,839 ha Nong fire, February 2019 8,879 ha in total; the hectares shown are those it shares with this fire
- 871 ha Nong fire, April 2017 12,875 ha in total; the hectares shown are those it shares with this fire
- 649 ha Nong fire, March 2020 2,587 ha in total; the hectares shown are those it shares with this fire
- 549 ha Nong fire, March 2018 2,118 ha in total; the hectares shown are those it shares with this fire
- 543 ha Nong fire, March 2016 2,220 ha in total; the hectares shown are those it shares with this fire
- 355 ha Nong fire, March 2021 3,263 ha in total; the hectares shown are those it shares with this fire
- 13 ha Nong fire, March 2021 2,071 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
-
Nong where it started2,598 ha1.4 %
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) |
|---|---|---|---|---|---|
| 14 Mar | 29.0 °C | 47 % | 43 km/h | 0.0 mm | Moderate 19 |
| 15 Mar | 34.4 °C | 33 % | 41 km/h | 0.0 mm | High 27 |
| 16 Mar | 33.2 °C | 43 % | 40 km/h | 0.0 mm | High 28 |
| 17 Mar | 34.8 °C | 34 % | 36 km/h | 0.0 mm | High 28 |
| 18 Mar | 35.4 °C | 34 % | 38 km/h | 0.0 mm | High 29 |
| 19 Mar | 36.6 °C | 34 % | 25 km/h | 0.0 mm | High 26 |
| 20 Mar | 36.2 °C | 36 % | 32 km/h | 0.0 mm | High 27 |
| 21 Mar | 36.2 °C | 37 % | 42 km/h | 0.0 mm | High 30 |
| 22 Mar | 37.5 °C | 33 % | 44 km/h | 0.0 mm | High 31 |
| 23 Mar | 37.0 °C | 37 % | 45 km/h | 0.4 mm | High 32 |
| 24 Mar | 37.4 °C | 36 % | 39 km/h | 0.7 mm | High 27 |
| 25 Mar | 38.0 °C | 33 % | 34 km/h | 1.7 mm | High 22 |
| 26 Mar | 36.4 °C | 41 % | 36 km/h | 3.2 mm | Low 10 |
| 27 Mar | 33.5 °C | 53 % | 38 km/h | 3.0 mm | Low 8 |
| 28 Mar | 30.8 °C | 55 % | 36 km/h | 0.3 mm | Moderate 14 |
| 29 Mar | 31.0 °C | 57 % | 26 km/h | 4.4 mm | Very low 3 |
| 30 Mar | 33.8 °C | 43 % | 24 km/h | 0.1 mm | Moderate 12 |
| 31 Mar | 33.6 °C | 51 % | 23 km/h | 3.4 mm | Very low 4 |
| 1 Apr after | 34.7 °C | 44 % | 25 km/h | 0.6 mm | Low 11 |
| 2 Apr after | 34.4 °C | 46 % | 37 km/h | 4.6 mm | Very low 4 |
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 · 116Every 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 Nong fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 14 March 2023 to 31 March 2023 (18 days). The perimeter dates it from 20 March 2023 to 27 March 2023.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,582 hectares (25.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Nong (2,598 ha, 1.4 %).
- What was the weather like?
- During the fire the temperature reached 38.0 °C, humidity dropped to 33 % and gusts hit 45 km/h. The fire danger index (FWI) reached 32, 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
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 20 March 2023 to 27 March 2023. 116 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.
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.