Sarny fire, August 2023 Сарненський район · Sarny
The fire started on 19 August 2023 in Sarny, Ukraine, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 194 hectares from satellite imagery, spread across a single municipality.
It is the 101th largest in Rivne Oblast since 2016 (of 167 with a page). Number 234 in Ukraine in 2023, of 491.
The power measured by the satellite is low (10.0 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
- 194ha
- Copernicus perimeter
- Duration
- 1day
- 19 Aug 2023 – 19 Aug 2023
- Municipalities hit
- 1
- districts
- Started on
- 19 Aug
- 2023
- Heat detections
- 10
- in a single hotspot: 10 MW
- Danger at start
- 15
- Moderate · FWI index
- Energy released
- 54MW
- 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 10 days without rain (1 mm or more) when it started. Rain came after the fire: 1.9 mm on 20 Aug.
This area had burned before
94% of the perimeter overlaps earlier fires recorded since 2016: 183 ha in 2020, 173 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 183 ha that had burned before.
What happened to each town
-
194 ha reached on 19 Aug0.1 %
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
- Other natural land73 %
- Mixed forest21 %
- Agricultural areas5.6 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
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) |
|---|---|---|---|---|---|
| 19 Aug | 30.4 °C | 38 % | 23 km/h | 0.0 mm | Moderate 15 |
| 20 Aug after | 31.3 °C | 41 % | 30 km/h | 1.9 mm | Low 8 |
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 21 August 2023 the air beside the fire reached 17 µg/m³ of PM2.5, but no daily average passed the WHO 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 · 10Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 1,560 haSarny Сарненський район13 February 2025 · 5 days · 2 km away
- 1,524 haSarny Сарненський район21 October 2021 · 5 days · 2 km away
- 2,025 haSarny Сарненський район26 February 2025 · 5 days · 7 km away
- 1,322 haSarny Сарненський район6 April 2020 · 6 days · 7 km away
- 1,703 haSarny Сарненський район21 October 2021 · 6 days · 8 km away
- 1,403 haDubrovytsia Дубровицький район4 March 2025 · 5 days · 14 km away
Frequently asked questions
- How long did the Sarny fire last?
- Copernicus dates it between 19 August 2023 and 19 August 2023: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 194 hectares (1.9 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Sarny (194 ha, 0.1 %).
- Did the fire reach a town?
- The closest fire to a town centre came within 38.2 km of Sarny. 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 30.4 °C, humidity dropped to 38 % and gusts hit 23 km/h. The fire danger index (FWI) reached 15, class Moderate.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Ukraine (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: 101 · 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 ADM2 (Public Domain). 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.