Nestou fire, August 2023 Νέστου · Nestou
The fire started on 21 August 2023 in Nestou, Greece, and satellites saw it burning for 3 days. Copernicus mapped a burnt perimeter of 1,359 hectares from satellite imagery, spread across a single municipality.
It is the 8th largest in Eastern Macedonia and Thrace since 2016 (of 27 with a page). Number 13 in Greece in 2023, of 34.
Compare with…
- Burnt area
- 1,359ha
- Copernicus perimeter
- Duration
- 3days
- 21 Aug 2023 – 23 Aug 2023
- Municipalities hit
- 1
- municipalities
- Started on
- 21 Aug
- 2023
- Heat detections
- 48
- in a single hotspot: 257 MW
- Danger at start
- 41
- Very high · FWI index
- Average daily power
- 458MW
- 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 5 days without rain (1 mm or more) when it started.
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).
Athens boundary: geoBoundaries · geoBoundaries, Wikimedia Commons (CC0 1.0).
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
-
1,361 ha reached on 21 Aug2.0 %
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
- Sclerophyllous scrub49 %
- Agricultural areas27 %
- Other natural land17 %
- Broadleaved forest4.3 %
- Scrub and transitional woodland1.8 %
- Artificial surfaces1.0 %
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) |
|---|---|---|---|---|---|
| 21 Aug | 34.8 °C | 20 % | 50 km/h | 0.0 mm | Very high 41 |
| 22 Aug | 34.6 °C | 27 % | 45 km/h | 0.0 mm | Very high 40 |
| 23 Aug | 34.2 °C | 26 % | 40 km/h | 0.0 mm | Very high 38 |
| 24 Aug after | 33.2 °C | 31 % | 34 km/h | 0.6 mm | High 28 |
| 25 Aug after | 32.9 °C | 36 % | 24 km/h | 0.1 mm | High 26 |
| 26 Aug after | 33.3 °C | 29 % | 38 km/h | 0.0 mm | High 32 |
| 27 Aug after | 32.0 °C | 30 % | 35 km/h | 0.0 mm | High 30 |
| 28 Aug after | 29.6 °C | 46 % | 26 km/h | 0.0 mm | High 24 |
| 29 Aug after | 29.9 °C | 38 % | 31 km/h | 0.0 mm | High 26 |
| 30 Aug after | 29.4 °C | 48 % | 30 km/h | 0.2 mm | High 24 |
| 31 Aug after | 30.3 °C | 31 % | 30 km/h | 0.4 mm | High 28 |
| 1 Sept after | 29.5 °C | 37 % | 23 km/h | 0.3 mm | High 26 |
| 2 Sept after | 30.5 °C | 31 % | 35 km/h | 0.4 mm | High 31 |
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 August 2023 the air beside the fire reached 19 µg/m³ of PM2.5. That day averaged 15: 1.0 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 · 48Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 107 haNestou ΝέστουMarch 2022 · 1 day · 19 km away
- 122 haTopirou ΤοπείρουOctober 2022 · 1 day · 22 km away
- 188 haTopirou ΤοπείρουJanuary 2024 · 2 days · 23 km away
- 115 haParanestiou ΠαρανεστίουSeptember 2017 · 1 day · 33 km away
- 4,079 haThassou Θάσου10 September 2016 · 5 days · 38 km away
- 166 haParanestiou ΠαρανεστίουJune 2025 · 1 day · 39 km away
Frequently asked questions
- How long did the Nestou fire last?
- Copernicus dates it between 21 August 2023 and 23 August 2023: 3 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 1,359 hectares (13.6 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Nestou (1,361 ha, 2.0 %).
- What was the weather like?
- During the fire the temperature reached 34.8 °C, humidity dropped to 20 % and gusts hit 50 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 Greece (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 · 199 · 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. 48 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 ADM3 (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication). 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.