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Sloviansk fire, 8 July 2025 Слов'янський район · Sloviansk, Lyman

Out · last detection 15 Jul 2025, 22:30 UTC

The fire started on 8 July 2025 in Sloviansk, Ukraine, and satellites saw it burning for 8 days. Copernicus mapped a burnt perimeter of 798 hectares from satellite imagery, spread across 2 municipalities.

It is the 53th largest in Donetsk Oblast since 2016 (of 1004 with a page). Number 78 in Ukraine in 2025, of 1359.

Compare with…

Suggestions: Sloviansk · 2024Sloviansk · 2024Lyman · 2024Lyman · 2022

Burnt area
798ha
Copernicus perimeter
Duration
8days
8 Jul 2025 – 15 Jul 2025
Municipalities hit
2
districts
Started on
8 Jul
2025
Heat detections
28
in a single hotspot: 49 MW
Danger at start
26
High · FWI index
Average daily power
42MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 8 Jul15 Jul
15 Jul 2025

How it evolved, day by day

8 Jul 2025 · 58 MW · 7 9 Jul 2025 · 1 MW · 1 10 Jul 2025 · 6 MW · 1 11 Jul 2025 · 167 MW · 12 12 Jul 2025 · 2 MW · 1 13 Jul 2025 · 56 MW · 3 15 Jul 2025 · 2 MW · 3
8 Jul 9 Jul 10 Jul 11 Jul 12 Jul 13 Jul 15 Jul

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

36°high
45km/h · peak gust
16%lowest humidity

It had gone 4 days without rain (1 mm or more) when it started. Rain came after the fire: 1.3 mm on 18 Jul.

This area had burned before

24% of the perimeter overlaps earlier fires recorded since 2016: 120 ha in 2022, 90 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 195 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 0.5% of the area of London (8 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Sloviansk Слов'янський район 6.3 km from the centre where it started
    670 ha reached on 8 Jul
    0.4 %
  2. Lyman Лиманський район 21,813 inhabitants · 8.9 km from the centre
    128 ha
    0.1 %

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

  • Coniferous forest79 %
  • Mixed forest21 %

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)
8 Jul 35.6 °C 19 % 38 km/h 0.0 mm High 26
9 Jul 35.2 °C 16 % 45 km/h 0.0 mm High 32
10 Jul 36.2 °C 17 % 41 km/h 0.0 mm High 33
11 Jul 34.6 °C 24 % 44 km/h 0.0 mm High 34
12 Jul 35.4 °C 23 % 34 km/h 0.0 mm High 32
13 Jul 35.3 °C 28 % 36 km/h 0.4 mm High 31
14 Jul 30.9 °C 30 % 37 km/h 0.6 mm High 26
15 Jul 31.5 °C 31 % 35 km/h 0.0 mm High 26
16 Jul after 31.6 °C 31 % 27 km/h 0.0 mm High 24
17 Jul after 32.6 °C 30 % 32 km/h 0.0 mm High 27
18 Jul after 32.5 °C 34 % 37 km/h 1.3 mm Moderate 18

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 1 Jul 2025
After · 22 Jul 2025

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 · Copernicus

On 12 July 2025 the air beside the fire reached 28 µg/m³ of PM2.5. That day averaged 22: 1.5 times the WHO daily guideline (15).

PM2.5 peak28 µg/m³
Days over the guideline3 days
PM1074 µg/m³
Optical depth0.46
678910111213
Good Fair Moderate Poor Very poor Extremely poor

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 · 28Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
Date and timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Ukraine ›

Frequently asked questions

How long did the Sloviansk fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 8 July 2025 to 15 July 2025 (8 days). The perimeter dates it from 8 July 2025 to 10 July 2025.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 798 hectares (8.0 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Sloviansk (670 ha, 0.4 %); Lyman (128 ha, 0.1 %).
Did the fire reach a town?
The fire started in Sloviansk and came within 6.3 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 36.2 °C, humidity dropped to 16 % and gusts hit 45 km/h. The fire danger index (FWI) reached 34, class High.
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 · 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.

RSS Changes to this page

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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 101 · 112.

How we know this
  • Perimeter: EFFIS (Copernicus), mapped on satellite imagery.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 8 July 2025 to 10 July 2025. 28 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.

How we build fire pages: methodology ›

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.