Valunia fire, April 2025 Valunia, Komboya, Niawa Lenga
The fire started on 8 April 2025 in Valunia, Sierra Leone, and satellites saw it burning for 2 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,418 hectares from heat detections, spread across 3 municipalities.
It is the 168th largest in Southern since 2016 (of 393 with a page). Number 37 in Sierra Leone in 2025, of 103.
Compare with…
- Burnt area
- 1,418ha
- GWIS perimeter (Copernicus)
- Duration
- 2days
- 8 Apr 2025 – 9 Apr 2025
- Municipalities hit
- 3
- chiefdoms
- Started on
- 8 Apr
- 2025
- Heat detections
- 29
- in a single hotspot: 172 MW
- Average daily power
- 288MW
- 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
29% of the perimeter overlaps earlier fires recorded since 2016: 424 ha in 2017.
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
-
Valunia where it started1,247 ha reached on 8 Apr1.5 %
-
173 ha reached on 9 Apr0.7 %
-
7 ha0.0 %
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 7 April 2025 the air beside the fire reached 73 µg/m³ of PM2.5. That day averaged 46: 3.1 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 · 29Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 20,541 haNiawa LengaMarch 2026 · 14 days · 10 km away
- 7,099 haValunia27 March 2016 · 14 days · 10 km away
- 7,934 haValunia3 March 2019 · 19 days · 16 km away
- 6,967 haKamajei16 March 2026 · 22 days · 27 km away
- 5,643 haBadjia29 March 2026 · 9 days · 33 km away
- 6,054 haSimbaru14 April 2022 · 6 days · 36 km away
Frequently asked questions
- How long did the Valunia fire last?
- GWIS (Copernicus) dates it between 8 April 2025 and 9 April 2025: 2 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,418 hectares (14.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Valunia (1,247 ha, 1.5 %); Komboya (173 ha, 0.7 %); Niawa Lenga (7 ha, 0.0 %).
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Sierra Leone (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 from the perimeter: the VIIRS detections inside it did not change them. 29 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 ADM3 (Creative Commons Attribution 4.0 (CC BY 4.0)). 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.