Lisso fire, 25 April 2026 Lisso
The fire started on 25 April 2026 in Lisso, Guinea, and satellites saw it burning for 12 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,518 hectares from heat detections, spread across a single municipality.
It is the 45th largest in Boké since 2016 (of 237 with a page). Number 74 in Guinea in 2026, of 269.
- Burnt area
- 3,518ha
- GWIS perimeter (Copernicus)
- Duration
- 12days
- 25 Apr 2026 – 6 May 2026
- Municipalities hit
- 1
- sub-prefectures
- Started on
- 25 Apr
- 2026
- Heat detections
- 68
- in a single hotspot: 227 MW
- Danger at start
- 46
- Very high · FWI index
- 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.
The weather it burned in
It had gone more than two months without rain (1 mm or more) when it started.
This area had burned before
93% of the perimeter overlaps earlier fires recorded since 2016: 2,620 ha in 2016, 914 ha in 2017, 64 ha in 2018, 1,062 ha in 2019, 1,162 ha in 2020, 525 ha in 2021, 863 ha in 2022, 272 ha in 2023, 564 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 3,268 ha that had burned before.
- 1,572 ha Lisso fire, April 2016 4,063 ha in total; the hectares shown are those it shares with this fire
- 627 ha Kolia fire, April 2017 5,642 ha in total; the hectares shown are those it shares with this fire
- 525 ha Lisso fire, April 2021 2,599 ha in total; the hectares shown are those it shares with this fire
- 301 ha Lisso fire, April 2016 2,737 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Lisso where it started3,542 ha reached on 25 Apr4.1 %
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.
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) |
|---|---|---|---|---|---|
| 25 Apr | 38.8 °C | 30 % | 34 km/h | 0.0 mm | Very high 46 |
| 26 Apr | 34.8 °C | 40 % | 34 km/h | 0.0 mm | High 36 |
| 27 Apr | 36.5 °C | 31 % | 27 km/h | 0.0 mm | High 36 |
| 28 Apr | 37.5 °C | 28 % | 24 km/h | 0.0 mm | High 37 |
| 29 Apr | 37.1 °C | 26 % | 26 km/h | 0.0 mm | Very high 39 |
| 30 Apr | 39.4 °C | 27 % | 30 km/h | 0.0 mm | Very high 41 |
| 1 May | 39.0 °C | 24 % | 32 km/h | 0.0 mm | Very high 42 |
| 2 May | 36.9 °C | 33 % | 36 km/h | 0.0 mm | Very high 43 |
| 3 May | 35.7 °C | 44 % | 36 km/h | 0.0 mm | High 35 |
| 4 May | 37.6 °C | 40 % | 28 km/h | 0.5 mm | High 32 |
| 5 May | 33.5 °C | 50 % | 32 km/h | 2.1 mm | Moderate 12 |
| 6 May | 35.7 °C | 41 % | 30 km/h | 4.8 mm | Low 8 |
| 7 May after | 38.2 °C | 34 % | 38 km/h | 0.0 mm | High 30 |
| 8 May after | 34.6 °C | 35 % | 27 km/h | 0.0 mm | High 28 |
| 9 May after | 34.1 °C | 38 % | 28 km/h | 0.0 mm | High 26 |
| 10 May after | 35.7 °C | 37 % | 30 km/h | 0.0 mm | High 30 |
| 11 May after | 37.6 °C | 40 % | 32 km/h | 0.1 mm | High 30 |
| 12 May after | 35.1 °C | 45 % | 27 km/h | 0.2 mm | High 28 |
| 13 May after | 35.8 °C | 47 % | 35 km/h | 0.3 mm | High 32 |
| 14 May after | 36.4 °C | 45 % | 34 km/h | 0.5 mm | High 29 |
| 15 May after | 36.6 °C | 39 % | 29 km/h | 0.6 mm | High 26 |
| 16 May after | 35.7 °C | 36 % | 34 km/h | 0.0 mm | High 32 |
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 4 May 2026 the air beside the fire reached 84 µg/m³ of PM2.5. That day averaged 53: 3.5 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 · 68Every 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 Lisso fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 25 April 2026 to 6 May 2026 (12 days). The perimeter dates it from 30 April 2026 to 6 May 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,518 hectares (35.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Lisso (3,542 ha, 4.1 %).
- What was the weather like?
- During the fire the temperature reached 39.4 °C, humidity dropped to 24 % and gusts hit 36 km/h. The fire danger index (FWI) reached 46, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Guinea (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 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.