Bum fire, February 2025 Bum
The fire started on 25 February 2025 in Bum, Sierra Leone, and satellites saw it burning for 1 day. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,124 hectares from heat detections, spread across a single municipality.
It is the 289th largest in Southern since 2016 (of 393 with a page). Number 72 in Sierra Leone in 2025, of 103.
- Burnt area
- 1,124ha
- GWIS perimeter (Copernicus)
- Duration
- 1day
- 25 Feb 2025 – 25 Feb 2025
- Municipalities hit
- 1
- chiefdoms
- Started on
- 25 Feb
- 2025
- Heat detections
- 32
- in a single hotspot: 105 MW
- Average daily power
- 978MW
- detected power per day, on average
Where it burned
How it evolved, day by day
25 Feb 2025 · 978 MW · 32
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Bum where it started1,132 ha reached on 25 Feb3.1 %
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.
The smoke
CAMS · CopernicusOn 26 February 2025 the air beside the fire reached 85 µg/m³ of PM2.5. That day averaged 66: 4.4 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 · 32Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 3,562 haYawbekoMarch 2026 · 9 days · 14 km away
- 2,826 haNongoba BullomMarch 2019 · 4 days · 14 km away
- 2,950 haKwamebai KrimMarch 2019 · 12 days · 20 km away
- 2,867 haKwamebai Krim21 March 2026 · 13 days · 20 km away
- 5,856 haKwamebai KrimMarch 2024 · 17 days · 23 km away
- 3,036 haKwamebai KrimMarch 2022 · 6 days · 27 km away
Frequently asked questions
- How long did the Bum fire last?
- GWIS (Copernicus) dates it between 25 February 2025 and 25 February 2025: 1 day 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 1,124 hectares (11.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Bum (1,132 ha, 3.1 %).
- 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
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 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.