Cabuérniga fire, 21 February 2021 Cabuérniga, Los Tojos
The fire started on 21 February 2021 in Cabuérniga, Spain, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 252 hectares from satellite imagery, spread across 2 municipalities.
It is the 59th largest in Cantabria since 2016 (of 179 with a page). Number 50 in Spain in 2021, of 120.
Compare with…
We have the Copernicus perimeter for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by municipality is there.
- Burnt area
- 252ha
- Copernicus perimeter
- Duration
- 1day
- 21 Feb 2021 – 21 Feb 2021
- Municipalities hit
- 2
- municipalities
- Started on
- 21 Feb
- 2021
- Danger at start
- 0
- Very low · FWI index
- Natura 2000
- 81%
- of the perimeter is protected land
Where it burned
The weather it burned in
It had gone 2 days without rain (1 mm or more) when it started. Rain came after the fire: 9.0 mm on 22 Feb.
This area had burned before
4% of the perimeter overlaps earlier fires recorded since 2016: 9 ha in 2019.
What happened to each town
-
166 ha1.9 %
-
Los Tojos 369 inhabitants · 3.3 km from the centre86 ha1.0 %
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
- Other natural land71 %
- Broadleaved forest29 %
Natura 2000 protected area affected: 81 %
- LIC Río Saja ES1300020
- LIC Valles altos del Nansa y Saja y Alto Campoo ES1300021
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.
People and buildings inside the perimeter
GHSL 2020Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, 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.
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
Several official records match this area
According to EGIF (MITECO), 4 fires started inside this perimeter on these dates, totalling 356 ha (the satellite measured 252 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
EGIF (MITECO) records each fire that started at a different time or place separately; the satellite sees a single burned area, so this page groups them together. The numbers on the map show where each one started.
- 1 Los Tojos El Tojo/ Alzar 19 February 2021 · 20:00 8 ha · extinguished on 19 February 2021 · cause: arson
- 2 Cabuérniga Fresneda /Colvaldriz 20 February 2021 · 15:30 58 ha · extinguished on 21 February 2021 · cause: arson
- 3 Los Tojos El Tojo/ la Mugosa 20 February 2021 · 17:32 183 ha · extinguished on 21 February 2021 · cause: arson
- 4 Los Tojos Saja /Solapeña 20 February 2021 · 23:00 107 ha · extinguished on 21 February 2021 · cause: arson
Total according to EGIF (MITECO): 356 ha, 141 % of the 252 ha in the satellite perimeter.
MITECO, Estadística General de Incendios Forestales (EGIF). This is the agency’s consolidated statistic: it measures the area in its own way, which is why it can differ from the satellite.
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) |
|---|---|---|---|---|---|
| 21 Feb | 13.6 °C | 47 % | 44 km/h | 9.9 mm | Very low 0 |
| 22 Feb after | 10.4 °C | 59 % | 38 km/h | 9.0 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 21 February 2021 the air beside the fire reached 42 µg/m³ of PM2.5. That day averaged 23: 1.5 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)
Other fires nearby
Frequently asked questions
- How long did the Cabuérniga fire last?
- Copernicus dates it between 21 February 2021 and 21 February 2021: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 252 hectares (2.5 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Cabuérniga (166 ha, 1.9 %); Los Tojos (86 ha, 1.0 %).
- Did the fire reach a town?
- The fire came within 3.3 km of the centre of Los Tojos, the closest of the areas it touched. 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 13.6 °C, humidity dropped to 47 % and gusts hit 44 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 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 · 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.
- Dates from the perimeter: the VIIRS detections inside it did not change them. No Suomi-NPP VIIRS detections on those dates.
- Compared with EGIF (MITECO): 356 official ha against 252 ha of perimeter; similar, but with reservations.
- 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 2020, 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 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.