Monreale fire, 23 August 2023 Monreale
The fire started on 23 August 2023 in Monreale, Italy, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 142 hectares from satellite imagery, spread across a single municipality.
It is the 137th largest in Palermo since 2016 (of 178 with a page). Number 148 in Italy in 2023, of 207.
The power measured by the satellite is low (11.4 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
- 142ha
- Copernicus perimeter
- Duration
- 2days
- 23 Aug 2023 – 24 Aug 2023
- Municipalities hit
- 1
- municipalities
- Started on
- 23 Aug
- 2023
- Heat detections
- 6
- in a single hotspot: 11 MW
- Danger at start
- 17
- Moderate · FWI index
- Average daily power
- 16MW
- detected power per day, on average
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 one day without rain (1 mm or more) when it started.
This area had burned before
90% of the perimeter overlaps earlier fires recorded since 2016: 109 ha in 2017, 24 ha in 2020, 63 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 128 ha that had burned before.
What happened to each town
-
Monreale where it started142 ha reached on 23 Aug0.3 %
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 areas78 %
- Sclerophyllous scrub22 %
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) |
|---|---|---|---|---|---|
| 23 Aug | 34.6 °C | 34 % | 30 km/h | 2.0 mm | Moderate 17 |
| 24 Aug | 34.5 °C | 36 % | 28 km/h | 2.1 mm | Moderate 14 |
| 25 Aug after | 34.3 °C | 32 % | 28 km/h | 0.0 mm | High 25 |
| 26 Aug after | 36.2 °C | 22 % | 22 km/h | 0.0 mm | High 29 |
| 27 Aug after | 36.1 °C | 23 % | 56 km/h | 0.0 mm | Very high 46 |
| 28 Aug after | 29.3 °C | 35 % | 51 km/h | 0.0 mm | Very high 39 |
| 29 Aug after | 27.7 °C | 39 % | 60 km/h | 0.1 mm | Very high 39 |
| 30 Aug after | 28.3 °C | 33 % | 44 km/h | 0.0 mm | High 33 |
| 31 Aug after | 29.1 °C | 37 % | 38 km/h | 0.0 mm | High 29 |
| 1 Sept after | 28.7 °C | 38 % | 34 km/h | 0.0 mm | High 30 |
| 2 Sept after | 30.9 °C | 34 % | 22 km/h | 0.0 mm | High 24 |
| 3 Sept after | 31.2 °C | 39 % | 32 km/h | 0.0 mm | High 29 |
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 24 August 2023 the air beside the fire reached 26 µg/m³ of PM2.5. That day averaged 22: 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)
Detections table · 6Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 2,120 haMonreale29 July 2021 · 3 days · 12 km away
- 3,728 haMonreale24 July 2023 · 3 days · 17 km away
- 2,867 haMonreale29 July 2021 · 4 days · 20 km away
- 5,542 haCustonaci20 July 2025 · 7 days · 33 km away
- 3,195 haCustonaciJuly 2017 · 2 days · 33 km away
- 3,057 haSan Vito Lo CapoAugust 2020 · 3 days · 34 km away
Frequently asked questions
- How long did the Monreale fire last?
- Copernicus dates it between 23 August 2023 and 24 August 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 142 hectares (1.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Monreale (142 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 34.6 °C, humidity dropped to 34 % and gusts hit 30 km/h. The fire danger index (FWI) reached 17, class Moderate.
- 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. 6 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.