Kasama fire, 17 August 2025 Kasama, Luwingu, Chilubi
The fire started on 17 August 2025 in Kasama, Zambia, and satellites saw it burning for 41 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 91,611 hectares from heat detections, spread across 4 municipalities.
It is the 2th largest in Northern since 2016 (of 629 with a page). Number 7 in Zambia in 2025, of 271.
Compare with…
- Burnt area
- 91,611ha
- GWIS perimeter (Copernicus)
- Duration
- 41days
- 17 Aug 2025 – 26 Sept 2025
- Municipalities hit
- 4
- districts
- Started on
- 17 Aug
- 2025
- Heat detections
- 4,049
- in a single hotspot: 149 MW
- Danger at start
- 36
- High · FWI index
- Average daily power
- 1.3GW
- 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 more than two months without rain (1 mm or more) when it started.
This area had burned before
90% of the perimeter overlaps earlier fires recorded since 2016: 30,019 ha in 2016, 30,130 ha in 2017, 13,879 ha in 2018, 31,609 ha in 2019, 40,308 ha in 2020, 28,380 ha in 2021, 33,005 ha in 2022, 25,828 ha in 2023, 27,330 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 82,816 ha that had burned before.
- 16,755 ha Kasama fire, August 2019 25,335 ha in total; the hectares shown are those it shares with this fire
- 13,622 ha Chilubi fire, September 2024 26,796 ha in total; the hectares shown are those it shares with this fire
- 10,792 ha Luwingu fire, August 2016 22,852 ha in total; the hectares shown are those it shares with this fire
- 10,790 ha Kasama fire, September 2020 15,882 ha in total; the hectares shown are those it shares with this fire
- 10,228 ha Kasama fire, September 2021 24,987 ha in total; the hectares shown are those it shares with this fire
- 6,751 ha Luwingu fire, September 2022 13,827 ha in total; the hectares shown are those it shares with this fire
- 5,622 ha Kasama fire, September 2020 8,558 ha in total; the hectares shown are those it shares with this fire
- 5,498 ha Kasama fire, September 2017 8,154 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
-
Kasama where it started56,762 ha reached on 17 Aug5.3 %
-
27,798 ha reached on 17 Aug5.6 %
-
7,690 ha reached on 20 Aug1.5 %
-
30 ha reached on 22 Aug0.0 %
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.
People and buildings inside the perimeter
GHSL 2025Inside the perimeter there were about 66 hectares of built-up land and about 6,000 residents (GHSL 2025, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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) |
|---|---|---|---|---|---|
| 17 Aug | 28.3 °C | 22 % | 34 km/h | 0.0 mm | High 36 |
| 18 Aug | 26.9 °C | 23 % | 31 km/h | 0.0 mm | High 36 |
| 19 Aug | 26.7 °C | 24 % | 32 km/h | 0.0 mm | High 34 |
| 20 Aug | 27.0 °C | 26 % | 32 km/h | 0.0 mm | High 36 |
| 21 Aug | 27.5 °C | 25 % | 35 km/h | 0.0 mm | High 36 |
| 22 Aug | 28.4 °C | 24 % | 32 km/h | 0.0 mm | High 36 |
| 23 Aug | 28.2 °C | 21 % | 36 km/h | 0.0 mm | High 36 |
| 24 Aug | 28.4 °C | 27 % | 31 km/h | 0.0 mm | High 34 |
| 25 Aug | 30.8 °C | 28 % | 33 km/h | 0.0 mm | High 36 |
| 26 Aug | 31.5 °C | 20 % | 35 km/h | 0.0 mm | Very high 41 |
| 27 Aug | 28.7 °C | 23 % | 44 km/h | 0.0 mm | Very high 44 |
| 28 Aug | 30.5 °C | 17 % | 35 km/h | 0.0 mm | Very high 42 |
| 29 Aug | 30.1 °C | 17 % | 39 km/h | 0.0 mm | Very high 45 |
| 30 Aug | 29.4 °C | 18 % | 43 km/h | 0.0 mm | Very high 46 |
| 31 Aug | 29.0 °C | 22 % | 40 km/h | 0.0 mm | Very high 45 |
| 1 Sept | 29.4 °C | 18 % | 41 km/h | 0.0 mm | Very high 46 |
| 2 Sept | 28.4 °C | 25 % | 40 km/h | 0.0 mm | Very high 44 |
| 3 Sept | 28.2 °C | 25 % | 41 km/h | 0.0 mm | Very high 43 |
| 4 Sept | 29.7 °C | 17 % | 40 km/h | 0.0 mm | Very high 44 |
| 5 Sept | 29.8 °C | 19 % | 42 km/h | 0.0 mm | Very high 46 |
| 6 Sept | 30.5 °C | 20 % | 29 km/h | 0.0 mm | Very high 40 |
| 7 Sept | 30.7 °C | 18 % | 33 km/h | 0.0 mm | Very high 43 |
| 8 Sept | 30.8 °C | 21 % | 30 km/h | 0.0 mm | Very high 43 |
| 9 Sept | 31.1 °C | 22 % | 34 km/h | 0.0 mm | Very high 42 |
| 10 Sept | 31.0 °C | 25 % | 31 km/h | 0.0 mm | Very high 44 |
| 11 Sept | 30.9 °C | 25 % | 38 km/h | 0.0 mm | Very high 44 |
| 12 Sept | 31.4 °C | 21 % | 33 km/h | 0.0 mm | Very high 43 |
| 13 Sept | 31.1 °C | 22 % | 32 km/h | 0.0 mm | Very high 45 |
| 14 Sept | 31.5 °C | 24 % | 27 km/h | 0.0 mm | Very high 41 |
| 15 Sept | 32.1 °C | 18 % | 31 km/h | 0.0 mm | Very high 45 |
| 16 Sept | 32.6 °C | 15 % | 27 km/h | 0.0 mm | Very high 45 |
| 17 Sept | 33.0 °C | 16 % | 29 km/h | 0.0 mm | Very high 47 |
| 18 Sept | 32.1 °C | 20 % | 35 km/h | 0.0 mm | Very high 49 |
| 19 Sept | 31.9 °C | 28 % | 38 km/h | 0.0 mm | Very high 45 |
| 20 Sept | 31.3 °C | 27 % | 49 km/h | 0.0 mm | Very high 50 |
| 21 Sept | 29.9 °C | 28 % | 40 km/h | 0.0 mm | Very high 45 |
| 22 Sept | 31.9 °C | 26 % | 35 km/h | 0.0 mm | Very high 41 |
| 23 Sept | 32.6 °C | 23 % | 34 km/h | 0.0 mm | Very high 43 |
| 24 Sept | 32.6 °C | 19 % | 32 km/h | 0.0 mm | Very high 45 |
| 25 Sept | 32.6 °C | 22 % | 35 km/h | 0.0 mm | Very high 46 |
| 26 Sept | 32.6 °C | 21 % | 44 km/h | 0.0 mm | Very high 49 |
| 27 Sept after | 32.9 °C | 21 % | 39 km/h | 0.0 mm | Very high 47 |
| 28 Sept after | 33.7 °C | 21 % | 35 km/h | 0.0 mm | Very high 44 |
| 29 Sept after | 35.0 °C | 17 % | 23 km/h | 0.0 mm | Very high 40 |
| 30 Sept after | 34.2 °C | 23 % | 38 km/h | 0.0 mm | Extreme 50 |
| 1 Oct after | 29.0 °C | 40 % | 45 km/h | 0.2 mm | Very high 41 |
| 2 Oct after | 31.0 °C | 28 % | 32 km/h | 0.0 mm | High 38 |
| 3 Oct after | 31.8 °C | 12 % | 34 km/h | 0.0 mm | Extreme 51 |
| 4 Oct after | 29.3 °C | 16 % | 42 km/h | 0.0 mm | Extreme 53 |
| 5 Oct after | 30.2 °C | 22 % | 37 km/h | 0.0 mm | Very high 48 |
| 6 Oct after | 31.5 °C | 21 % | 28 km/h | 0.0 mm | Very high 42 |
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 6 September 2025 the air beside the fire reached 117 µg/m³ of PM2.5. That day averaged 62: 4.2 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 · 4,049Every 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 Kasama fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 17 August 2025 to 26 September 2025 (41 days). The perimeter dates it from 20 August 2025 to 19 September 2025.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 91,611 hectares (916.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 4 municipalities: Kasama (56,762 ha, 5.3 %); Luwingu (27,798 ha, 5.6 %); Chilubi (7,690 ha, 1.5 %); Kanchibiya (30 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 33.0 °C, humidity dropped to 15 % and gusts hit 49 km/h. The fire danger index (FWI) reached 50, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Zambia (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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 19 September 2025 → 26 September 2025.
- Start date: 20 August 2025 → 17 August 2025.
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; 6 polygons grouped in this page.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 20 August 2025 to 19 September 2025. 4,049 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.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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 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.