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Calañas fire, September 2025 Calañas

Out · last detection 13 Sept 2025, 01:50 UTC

The fire started on 12 September 2025 in Calañas, Spain, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 171 hectares from satellite imagery, spread across a single municipality.

It is the 30th largest in Huelva since 2016 (of 36 with a page). Number 120 in Spain in 2025, of 158.

The power measured by the satellite is low (0.8 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
171ha
Copernicus perimeter
Duration
2days
12 Sept 2025 – 13 Sept 2025
Municipalities hit
1
municipalities
Started on
12 Sept
2025
Heat detections
2
in a single hotspot: 1 MW
Danger at start
42
Very high · FWI index
Energy released
2MW
sum of detected power

Where it burned

HOTSPOTS BY DAY 12 Sept13 Sept

How it evolved, day by day

13

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

35°high
38km/h · peak gust
19%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

  1. Calañas 1,181 inhabitants · 4.6 km from the town where it started
    171 ha reached on 13 Sept
    0.6 %

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

  • Broadleaved forest33 %
  • Agricultural areas25 %
  • Sclerophyllous scrub17 %
  • Other natural land14 %
  • Scrub and transitional woodland7.1 %
  • Mixed forest3.6 %

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)
12 Sept 35.3 °C 23 % 31 km/h 0.0 mm Very high 42
13 Sept 33.2 °C 19 % 38 km/h 0.0 mm Very high 46
14 Sept after 33.6 °C 26 % 36 km/h 0.0 mm Very high 47
15 Sept after 34.6 °C 26 % 23 km/h 0.0 mm Very high 40
16 Sept after 35.4 °C 27 % 22 km/h 0.0 mm Very high 41
17 Sept after 36.0 °C 24 % 22 km/h 0.0 mm Very high 40
18 Sept after 34.1 °C 31 % 34 km/h 0.0 mm Very high 40
19 Sept after 31.3 °C 37 % 29 km/h 0.0 mm High 34
20 Sept after 31.7 °C 33 % 32 km/h 0.1 mm High 37
21 Sept after 26.7 °C 19 % 45 km/h 0.0 mm Very high 45
22 Sept after 26.4 °C 19 % 31 km/h 0.0 mm Very high 40
23 Sept after 27.3 °C 19 % 32 km/h 0.0 mm Very high 40

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 5 Sept 2025
After · 20 Sept 2025

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 · Copernicus

On 15 September 2025 the air beside the fire reached 8 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak8 µg/m³
Days over the guideline0 days
PM1010 µg/m³
Optical depth0.12
10111213141516
Good Fair Moderate Poor Very poor Extremely poor

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 · 2Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
Date and timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Spain ›

Frequently asked questions

How long did the Calañas fire last?
Copernicus dates it between 12 September 2025 and 13 September 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 171 hectares (1.7 km²). Official national figures may differ.
Which municipalities burned?
The fire only entered Calañas (171 ha, 0.6 %).
Did the fire reach a town?
The closest fire to a town centre came within 4.6 km of Calañas. 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 35.3 °C, humidity dropped to 19 % and gusts hit 38 km/h. The fire danger index (FWI) reached 46, class Very high.
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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 112.

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.