Koya fire, 25 April 2024 Koya
The fire started on 25 April 2024 in Koya, Sierra Leone, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,243 hectares from heat detections, spread across a single municipality.
It is the 230th largest in Southern since 2016 (of 393 with a page). Number 72 in Sierra Leone in 2024, of 140.
- Burnt area
- 1,243ha
- GWIS perimeter (Copernicus)
- Duration
- 6days
- 25 Apr 2024 – 30 Apr 2024
- Municipalities hit
- 1
- chiefdoms
- Started on
- 25 Apr
- 2024
- Heat detections
- 38
- in a single hotspot: 156 MW
- Energy released
- 2.1GW
- 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
60% of the perimeter overlaps earlier fires recorded since 2016: 617 ha in 2016, 48 ha in 2020, 126 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 740 ha that had burned before.
- 617 ha Koya fire, April 2016 1,010 ha in total; the hectares shown are those it shares with this fire
- 126 ha Koya fire, April 2022 1,463 ha in total; the hectares shown are those it shares with this fire
- 48 ha Koya fire, April 2020 1,254 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Koya where it started1,253 ha reached on 25 Apr0.8 %
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 29 April 2024 the air beside the fire reached 90 µg/m³ of PM2.5. That day averaged 58: 3.9 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 · 38Every 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 Koya fire last?
- GWIS (Copernicus) dates it between 25 April 2024 and 30 April 2024: 6 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 1,243 hectares (12.4 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Koya (1,253 ha, 0.8 %).
- 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.