Serri fire, August 2021 Mandas, Serri, Escolca
The fire started on 12 August 2021 in Serri, Italy, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 137 hectares from satellite imagery, spread across 3 municipalities.
It is the 27th largest in Sud Sardegna since 2016 (of 37 with a page). Number 210 in Italy in 2021, of 291.
The power measured by the satellite is low (2.2 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
- Burnt area
- 137ha
- Copernicus perimeter
- Duration
- 1day
- 12 Aug 2021 – 12 Aug 2021
- Municipalities hit
- 3
- municipalities
- Started on
- 12 Aug
- 2021
- Heat detections
- 2
- in a single hotspot: 2 MW
- Danger at start
- 41
- Very high · FWI index
- Average daily power
- 4MW
- detected power per day, on average
Where it burned
How it evolved, day by day
12 Aug 2021 · 4 MW · 2
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 16 days without rain (1 mm or more) when it started. Rain came after the fire: 1.8 mm on 15 Aug.
This area had burned before
6% of the perimeter overlaps earlier fires recorded since 2016: 8 ha in 2020.
What happened to each town
-
Mandas 2,004 inhabitants · 2.6 km from the centre92 ha reached on 12 Aug2.0 %
-
37 ha reached on 12 Aug1.9 %
-
8 ha0.5 %
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
- Sclerophyllous scrub71 %
- Agricultural areas25 %
- Coniferous forest3.7 %
- Mixed forest0.7 %
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
Official record
According to CFVA Sardegna, this fire started on 11 August 2021 and burned 137 ha (the satellite measured 137 ha).
- Mandas M. Carrogas 11 August 2021 137 ha
Regione Autonoma della Sardegna, Corpo Forestale e di Vigilanza Ambientale: perimetri delle aree percorse dal fuoco (CC BY 4.0). 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) |
|---|---|---|---|---|---|
| 12 Aug | 36.1 °C | 28 % | 29 km/h | 0.2 mm | Very high 41 |
| 13 Aug after | 37.4 °C | 26 % | 33 km/h | 0.5 mm | Very high 39 |
| 14 Aug after | 34.5 °C | 34 % | 26 km/h | 0.2 mm | High 34 |
| 15 Aug after | 34.8 °C | 33 % | 36 km/h | 1.8 mm | High 23 |
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.
Detections table · 2Every 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 Serri fire last?
- Copernicus dates it between 12 August 2021 and 12 August 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 137 hectares (1.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Mandas (92 ha, 2.0 %); Serri (37 ha, 1.9 %); Escolca (8 ha, 0.5 %).
- Did the fire reach a town?
- The fire started in Serri and came within 2.1 km of its centre. 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 36.1 °C, humidity dropped to 28 % and gusts hit 29 km/h. The fire danger index (FWI) reached 41, class Very high.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Italy (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 · 1515 · 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. 2 Suomi-NPP VIIRS detections on those dates.
- Compared with CFVA Sardegna: 137 official ha against 137 ha of perimeter; they agree within 25%.
- 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 ADM4 (Creative Commons Attribution 3.0 License). 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.