Calatafimi-Segesta fire, July 2023 Calatafimi-Segesta, Castellammare del Golfo
The fire started on 24 July 2023 in Calatafimi-Segesta, Italy, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 679 hectares from satellite imagery, spread across 2 municipalities.
It is the 12th largest in Trapani since 2016 (of 68 with a page). Number 24 in Italy in 2023, of 207.
Compare with…
- Burnt area
- 679ha
- Copernicus perimeter
- Duration
- 2days
- 24 Jul 2023 – 25 Jul 2023
- Municipalities hit
- 2
- municipalities
- Started on
- 24 Jul
- 2023
- Heat detections
- 59
- in a single hotspot: 39 MW
- Danger at start
- 59
- Extreme · FWI index
- Average daily power
- 856MW
- detected power per day, on average
Where it burned
How it evolved, day by day
25 Jul 2023 · 856 MW · 59
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 38 days without rain (1 mm or more) when it started. Rain came after the fire: 7.1 mm on 4 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Rome boundary: geoBoundaries · ISTAT, National Institute of Statistics (CC BY 3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
638 ha reached on 25 Jul4.1 %
-
Castellammare del Golfo 14,610 inhabitants · 8.8 km from the centre43 ha reached on 25 Jul0.3 %
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
- Agricultural areas54 %
- Sclerophyllous scrub23 %
- Coniferous forest23 %
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) |
|---|---|---|---|---|---|
| 24 Jul | 40.6 °C | 14 % | 49 km/h | 0.0 mm | Extreme 59 |
| 25 Jul | 37.7 °C | 28 % | 57 km/h | 0.0 mm | Extreme 58 |
| 26 Jul after | 29.8 °C | 40 % | 51 km/h | 0.0 mm | Very high 41 |
| 27 Jul after | 30.1 °C | 37 % | 41 km/h | 0.0 mm | High 34 |
| 28 Jul after | 32.0 °C | 34 % | 40 km/h | 0.0 mm | High 35 |
| 29 Jul after | 33.2 °C | 44 % | 33 km/h | 0.0 mm | High 29 |
| 30 Jul after | 35.4 °C | 20 % | 40 km/h | 0.0 mm | Very high 45 |
| 31 Jul after | 32.7 °C | 34 % | 44 km/h | 0.0 mm | Very high 41 |
| 1 Aug after | 31.2 °C | 45 % | 40 km/h | 0.0 mm | High 33 |
| 2 Aug after | 31.9 °C | 40 % | 37 km/h | 0.0 mm | High 31 |
| 3 Aug after | 33.1 °C | 31 % | 32 km/h | 0.0 mm | High 30 |
| 4 Aug after | 33.4 °C | 33 % | 46 km/h | 7.1 mm | Moderate 14 |
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 22 July 2023 the air beside the fire reached 26 µg/m³ of PM2.5. That day averaged 22: 1.4 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 · 59Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 1,567 haSalemiAugust 2023 · 2 days · 7 km away
- 1,551 haBuseto PalizzoloAugust 2022 · 2 days · 8 km away
- 5,542 haCustonaci20 July 2025 · 7 days · 17 km away
- 3,195 haCustonaciJuly 2017 · 2 days · 18 km away
- 3,057 haSan Vito Lo CapoAugust 2020 · 3 days · 20 km away
- 2,120 haMonreale29 July 2021 · 3 days · 38 km away
Frequently asked questions
- How long did the Calatafimi-Segesta fire last?
- Copernicus dates it between 24 July 2023 and 25 July 2023: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 679 hectares (6.8 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Calatafimi-Segesta (638 ha, 4.1 %); Castellammare del Golfo (43 ha, 0.3 %).
- Did the fire reach a town?
- The fire started in Calatafimi-Segesta and came within 1.9 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 40.6 °C, humidity dropped to 14 % and gusts hit 57 km/h. The fire danger index (FWI) reached 59, class Extreme.
- 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. 59 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
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.