Postojna fire, February 2025 Postojna
The fire started on 4 February 2025 in Postojna, Slovenia, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 143 hectares from satellite imagery, spread across a single municipality.
The only fire in Slovenia with a page in 2025.
The power measured by the satellite is low (9.7 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
- Burnt area
- 143ha
- Copernicus perimeter
- Duration
- 2days
- 4 Feb 2025 – 5 Feb 2025
- Municipalities hit
- 1
- municipalities
- Started on
- 4 Feb
- 2025
- Heat detections
- 4
- in a single hotspot: 10 MW
- Danger at start
- 0
- Very low · FWI index
- Energy released
- 32MW
- 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 2 days without rain (1 mm or more) when it started. Rain came after the fire: 1.2 mm on 9 Feb.
This area had burned before
87% of the perimeter overlaps earlier fires recorded since 2016: 121 ha in 2020, 116 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 125 ha that had burned before.
What happened to each town
-
Postojna where it started143 ha reached on 5 Feb0.5 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Other natural land96 %
- Scrub and transitional woodland2.1 %
- Broadleaved forest1.4 %
Natura 2000 protected area affected: 100 %
- LIC Javorniki - Snežnik SI3000231
- ZEPA Snežnik - Pivka SI5000002
Natura 2000 sites (European Environment Agency, 2024 release) crossed by the perimeter.
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
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) |
|---|---|---|---|---|---|
| 4 Feb | 4.9 °C | 48 % | 45 km/h | 0.0 mm | Very low 0 |
| 5 Feb | 8.9 °C | 33 % | 27 km/h | 0.0 mm | Very low 0 |
| 6 Feb after | 4.0 °C | 66 % | 53 km/h | 0.0 mm | Very low 1 |
| 7 Feb after | 4.1 °C | 59 % | 45 km/h | 0.0 mm | Very low 1 |
| 8 Feb after | 7.4 °C | 64 % | 15 km/h | 0.1 mm | Very low 0 |
| 9 Feb after | 7.8 °C | 71 % | 15 km/h | 1.2 mm | Very low 0 |
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 8 February 2025 the air beside the fire reached 35 µg/m³ of PM2.5. That day averaged 21: 1.4 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 · 4Every 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 Postojna fire last?
- Copernicus dates it between 4 February 2025 and 5 February 2025: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 143 hectares (1.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Postojna (143 ha, 0.5 %).
- What was the weather like?
- During the fire the temperature reached 8.9 °C, humidity dropped to 33 % and gusts hit 45 km/h. The fire danger index (FWI) reached 0, class Very low.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Slovenia (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: 112
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 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 (Open Data Commons Open Database License 1.0). 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.