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UA · Ukraine ·

Kreminna fire, 7 September 2025 Кремінський район · Kreminna

Out · last detection 7 Sept 2025, 10:04 UTC

The fire started on 7 September 2025 in Kreminna, Ukraine, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 131 hectares from satellite imagery, spread across a single municipality.

It is the 694th largest in Luhansk Oblast since 2016 (of 909 with a page). Number 1023 in Ukraine in 2025, of 1358.

The power measured by the satellite is low (2.1 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…

Suggestions: Troitske · 2025Perevalsk · 2023Novoaidar · 2024Popasna · 2020

Burnt area
131ha
Copernicus perimeter
Duration
1day
7 Sept 2025 – 7 Sept 2025
Municipalities hit
1
districts
Started on
7 Sept
2025
Heat detections
1
in a single hotspot: 2 MW
Danger at start
27
High · FWI index
Average daily power
2MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 7 Sept7 Sept

How it evolved, day by day

7 Sept 2025 · 2 MW · 1

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

The weather it burned in

26°high
39km/h · peak gust
38%lowest humidity

It had gone 4 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.

What happened to each town

  1. Kreminna Кремінський район 41,084 inhabitants · 24.9 km from the centre where it started
    130 ha reached on 7 Sept
    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

  • Other natural land82 %
  • Mixed forest15 %
  • Agricultural areas3.1 %

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)
7 Sept 26.4 °C 38 % 39 km/h 0.0 mm High 27
8 Sept after 27.6 °C 39 % 38 km/h 0.5 mm High 26
9 Sept after 28.9 °C 29 % 43 km/h 0.1 mm High 32
10 Sept after 24.6 °C 28 % 48 km/h 0.0 mm High 36
11 Sept after 24.2 °C 22 % 40 km/h 0.0 mm High 35
12 Sept after 24.7 °C 29 % 40 km/h 0.0 mm High 36
13 Sept after 21.3 °C 27 % 40 km/h 0.0 mm High 36
14 Sept after 25.4 °C 26 % 38 km/h 0.0 mm High 35
15 Sept after 25.7 °C 24 % 37 km/h 0.0 mm High 35
16 Sept after 24.5 °C 20 % 37 km/h 0.0 mm High 37
17 Sept after 24.9 °C 17 % 46 km/h 0.0 mm Very high 44

Its twins: fires that started in the same weather

It started with an FWI of 26.6, a minimum humidity of 38% and 4 days without rain. Fires in the area that started in weather like this since 2016: 51.

FWI at the start 26.6
Minimum humidity 38 %
Days without rain 4
this fire chosen twins rest of the area
Almost identicalSimilar

Outlines of the closest twins

Troitske fire, August 2025
293 ha 2 days FWI 25.9 Min. humidity 38 % 68 km away, in 2025

First rain (1 mm or more) after it ended: 5.0 mm on 23 Aug.

See its page Compare with this fire

What happened to them

3 days
median duration
190 ha
median area
2 %
went past 1,000 ha
4.0 mm
rain at the end (median; 39 of 51 had it)

It burned an area similar to its twins (131 ha against a median of 190 ha) and lasted 1 day, against 3 days.

In 12 of 51, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 4.0 mm.

This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it

How it ended

—first rain
—no rain in ten days
39km/h · max. gust

It was considered over on 7 Sept, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 39 of 51, with a median of 4.0 mm.

Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

How a twin is chosen

  • Same area: fires that have already ended, less than 250 km from this one, since 2016.
  • Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
  • Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
  • Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
  • They are sorted by similarity, and the outlines of the first five are drawn.

How we calculate it

Before and after, from space

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

Before · 31 Aug 2025
After · 14 Sept 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 7 September 2025 the air beside the fire reached 11 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak11 µg/m³
Days over the guideline0 days
PM1016 µg/m³
Optical depth0.42
5 Sept7 Sept9 Sept
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 · 1Every 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 Kreminna fire last?
Copernicus dates it between 7 September 2025 and 7 September 2025: 1 day between the first and last image with fire.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 131 hectares (1.3 km²). Official national figures may differ.
Which municipalities burned?
The fire only entered Kreminna (130 ha, 0.1 %).
Did the fire reach a town?
The fire started in Kreminna and came within 24.9 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 26.4 °C, humidity dropped to 38 % and gusts hit 39 km/h. The fire danger index (FWI) reached 27, 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.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 51. Their median duration was 3 days and their median area 190 ha; 2 % went past 1,000 ha. In 12 of 51, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 4.0 mm.

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 With cross-checks and a citable version

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 from the perimeter: the VIIRS detections inside it did not change them. One Suomi-NPP VIIRS detection 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.