Bakhmut fire, 29 August 2025 Бахмутський район · Bakhmut
The fire started on 29 August 2025 in Bakhmut, Ukraine, and satellites saw it burning for 4 days. Copernicus mapped a burnt perimeter of 828 hectares from satellite imagery, spread across a single municipality.
It is the 51th largest in Donetsk Oblast since 2016 (of 1004 with a page). Number 77 in Ukraine in 2025, of 1359.
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- Burnt area
- 828ha
- Copernicus perimeter
- Duration
- 4days
- 29 Aug 2025 – 1 Sept 2025
- Municipalities hit
- 1
- districts
- Started on
- 29 Aug
- 2025
- Heat detections
- 29
- in a single hotspot: 102 MW
- Danger at start
- 35
- High · FWI index
- Average daily power
- 122MW
- 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 3 days without rain (1 mm or more) when it started.
This area had burned before
1% of the perimeter overlaps earlier fires recorded since 2016: 7 ha in 2024.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Kyiv boundary: geoBoundaries · OpenStreetMap, Wambacher · © OpenStreetMap contributors (ODbL 1.0).
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).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
829 ha reached on 29 Aug0.5 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Agricultural areas86 %
- Other natural land10.0 %
- Mixed forest2.6 %
- Artificial surfaces1.0 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
People and buildings inside the perimeter
GHSL 2025Inside the perimeter there were about 1.0 hectares of built-up land and about 30 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) |
|---|---|---|---|---|---|
| 29 Aug | 31.0 °C | 17 % | 26 km/h | 0.0 mm | High 35 |
| 30 Aug | 32.2 °C | 18 % | 45 km/h | 0.0 mm | Very high 47 |
| 31 Aug | 33.6 °C | 20 % | 33 km/h | 0.0 mm | Very high 41 |
| 1 Sept | 32.3 °C | 30 % | 34 km/h | 0.0 mm | High 38 |
| 2 Sept after | 29.7 °C | 37 % | 26 km/h | 0.6 mm | High 27 |
| 3 Sept after | 25.5 °C | 37 % | 32 km/h | 0.0 mm | High 30 |
| 4 Sept after | 23.1 °C | 38 % | 30 km/h | 0.0 mm | High 28 |
| 5 Sept after | 23.7 °C | 38 % | 33 km/h | 0.0 mm | High 30 |
| 6 Sept after | 24.4 °C | 34 % | 31 km/h | 0.0 mm | High 29 |
| 7 Sept after | 26.4 °C | 36 % | 35 km/h | 0.0 mm | High 30 |
| 8 Sept after | 27.5 °C | 34 % | 34 km/h | 0.1 mm | High 30 |
| 9 Sept after | 28.7 °C | 25 % | 42 km/h | 0.8 mm | Very high 38 |
| 10 Sept after | 24.6 °C | 28 % | 51 km/h | 0.7 mm | High 38 |
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 31 August 2025 the air beside the fire reached 30 µg/m³ of PM2.5. That day averaged 17: 1.1 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
Frequently asked questions
- How long did the Bakhmut fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 29 August 2025 to 1 September 2025 (4 days). The perimeter dates it from 29 August 2025 to 31 August 2025.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 828 hectares (8.3 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Bakhmut (829 ha, 0.5 %).
- Did the fire reach a town?
- The fire started in Bakhmut and came within 20.9 km of its centre. That is the distance from the perimeter, or the nearest hotspot, to the point marking the centre; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 33.6 °C, humidity dropped to 17 % and gusts hit 45 km/h. The fire danger index (FWI) reached 47, class Very high.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Ukraine (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.
Emergency number: 101 · 112 · Emergency number and official warnings ›
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: EFFIS (Copernicus), mapped on satellite imagery; 2 polygons grouped in this page.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 29 August 2025 to 31 August 2025. 29 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 and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. 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 (Public Domain). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.