Caso fire, August 2025 Caso
The fire started on 13 August 2025 in Caso, Spain, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 235 hectares from satellite imagery, spread across a single municipality.
It is the 73th largest in Asturias since 2016 (of 225 with a page). Number 102 in Spain in 2025, of 158.
- Burnt area
- 235ha
- Copernicus perimeter
- Duration
- 2days
- 13 Aug 2025 – 14 Aug 2025
- Municipalities hit
- 1
- municipalities
- Started on
- 13 Aug
- 2025
- Heat detections
- 30
- in a single hotspot: 61 MW
- Danger at start
- 4
- Very low · FWI index
- Energy released
- 98MW
- 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 20 days without rain (1 mm or more) when it started. Rain came after the fire: 2.6 mm on 18 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
235 ha reached on 14 Aug0.8 %
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 land72 %
- Broadleaved forest28 %
Natura 2000 protected area affected: 100 %
- ZEPA + LIC Redes ES1200008
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) |
|---|---|---|---|---|---|
| 13 Aug | 27.2 °C | 42 % | 37 km/h | 4.7 mm | Very low 4 |
| 14 Aug | 30.0 °C | 32 % | 41 km/h | 0.0 mm | Moderate 14 |
| 15 Aug after | 31.5 °C | 26 % | 42 km/h | 0.0 mm | High 26 |
| 16 Aug after | 32.2 °C | 21 % | 36 km/h | 0.0 mm | High 27 |
| 17 Aug after | 29.7 °C | 35 % | 41 km/h | 0.9 mm | Moderate 17 |
| 18 Aug after | 19.5 °C | 85 % | 27 km/h | 2.6 mm | Very low 1 |
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 17 August 2025 the air beside the fire reached 34 µg/m³ of PM2.5. That day averaged 24: 1.6 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 · 30Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 715 haPonga28 March 2023 · 4 days · 15 km away
- 732 haBurónSeptember 2025 · 2 days · 18 km away
- 990 haParres28 March 2023 · 4 days · 24 km away
- 1,181 haCabralesAugust 2025 · 4 days · 37 km away
- 19,112 haBarniedo de la Reina Boca de HuérganoAugust 2025 · 12 days · 39 km away
- 591 haLlanes28 March 2023 · 3 days · 39 km away
Frequently asked questions
- How long did the Caso fire last?
- Copernicus dates it between 13 August 2025 and 14 August 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 235 hectares (2.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Caso (235 ha, 0.8 %).
- Did the fire reach a town?
- The closest fire to a town centre came within 4.7 km of Caso. That is the distance to the perimeter or nearest hotspot; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 30.0 °C, humidity dropped to 32 % and gusts hit 41 km/h. The fire danger index (FWI) reached 14, class Moderate.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Spain (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 ADM3 (Creative Commons Attribution 4.0 International (CC BY 4.0)). 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.