Olvera fire, August 2020 Olvera, Cañete la Real, Alcalá del Valle
The fire started on 2 August 2020 in Olvera, Spain, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 509 hectares from satellite imagery, spread across 3 municipalities.
It is the 2th largest in Cádiz since 2016 (of 16 with a page). Number 20 in Spain in 2020, of 89.
The power measured by the satellite is low (2.0 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
- 509ha
- Copernicus perimeter
- Duration
- 2days
- 2 Aug 2020 – 3 Aug 2020
- Municipalities hit
- 3
- municipalities
- Started on
- 2 Aug
- 2020
- Heat detections
- 4
- in a single hotspot: 2 MW
- Danger at start
- 45
- Very high · FWI index
- Energy released
- 5MW
- 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 58 days without rain (1 mm or more) when it started. Rain came after the fire: 2.9 mm on 10 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
390 ha reached on 3 Aug2.0 %
-
Cañete la Real 1,569 inhabitants · 6.2 km from the town118 ha0.7 %
-
Alcalá del Valle 4,864 inhabitants · 6.3 km from the town2 ha0.0 %
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
- Agricultural areas80 %
- Sclerophyllous scrub20 %
Natura 2000 protected area affected: 0 %
- LIC Río Corbones ES6180011
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.
Official record
According to EGIF (MITECO), this fire started on 2 August 2020 and burned 358 ha (the satellite measured 509 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
- Olvera las almendras 2 August 2020 · 10:28 358 ha · extinguished on 6 August 2020 · cause: arson
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) |
|---|---|---|---|---|---|
| 2 Aug | 35.0 °C | 21 % | 35 km/h | 0.0 mm | Very high 45 |
| 3 Aug | 30.9 °C | 32 % | 37 km/h | 0.0 mm | Very high 40 |
| 4 Aug after | 29.5 °C | 52 % | 36 km/h | 0.0 mm | High 26 |
| 5 Aug after | 31.3 °C | 34 % | 43 km/h | 0.0 mm | High 32 |
| 6 Aug after | 31.8 °C | 34 % | 54 km/h | 0.0 mm | High 38 |
| 7 Aug after | 32.5 °C | 31 % | 40 km/h | 0.0 mm | High 35 |
| 8 Aug after | 34.8 °C | 27 % | 28 km/h | 0.0 mm | High 35 |
| 9 Aug after | 34.1 °C | 32 % | 28 km/h | 0.0 mm | High 34 |
| 10 Aug after | 30.7 °C | 39 % | 41 km/h | 2.9 mm | Moderate 11 |
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 1 August 2020 the air beside the fire reached 20 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 · 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 Olvera fire last?
- Copernicus dates it between 2 August 2020 and 3 August 2020: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 509 hectares (5.1 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Olvera (390 ha, 2.0 %); Cañete la Real (118 ha, 0.7 %); Alcalá del Valle (2 ha, 0.0 %).
- Did the fire reach a town?
- The closest fire to a town centre came within 6.2 km of Cañete la Real. 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 35.0 °C, humidity dropped to 21 % and gusts hit 37 km/h. The fire danger index (FWI) reached 45, 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
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.