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UA · Ukraine · –

Oleshky fire, 17 June 2026 Олешківський район · Beryslav, Oleshky, Bilozerka

Out · last detection 28 Jun 2026, 23:55 UTC

The fire started on 17 June 2026 in Oleshky, Ukraine, and satellites saw it burning for 13 days. Copernicus mapped a burnt perimeter of 500 hectares from satellite imagery, spread across 3 municipalities.

It is the 208th largest in Kherson Oblast since 2016 (of 1102 with a page). Number 141 in Ukraine in 2026, of 984.

The power measured by the satellite is low (10.3 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: Beryslav · 2025Kakhovka · 2025Bilozerka · 2023Bilozerka · 2026

Burnt area
500ha
Copernicus perimeter
Duration
≈ 13days
17 Jun 2026 – 29 Jun 2026
Municipalities hit
3
districts
Started on
17 Jun
2026
Heat detections
4
in a single hotspot: 10 MW
Danger at start
20
Moderate · FWI index
Average daily power
12MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 17 Jun29 Jun
28 Jun 2026

How it evolved, day by day

22 Jun 2026 · 21 MW · 2 28 Jun 2026 · 3 MW · 2
22 Jun 28 Jun

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

The weather it burned in

34°high
43km/h · peak gust
26%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 9.1 mm on 4 Jul.

This area had burned before

38% of the perimeter overlaps earlier fires recorded since 2016: 2 ha in 2022, 184 ha in 2023, 93 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 189 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 0.3% of the area of London (5 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. Beryslav
    227 ha
    0.1 %
  2. Oleshky Олешківський район 70,367 inhabitants · 23.4 km from the centre where it started
    222 ha reached on 22 Jun
    0.1 %
  3. Bilozerka Білозерський район 64,790 inhabitants · 71.6 km from the centre
    52 ha
    0.0 %

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

  • Agricultural areas55 %
  • Other natural land25 %
  • Artificial surfaces20 %

Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).

People and buildings inside the perimeter

GHSL 2025
Built-up area24 ha
Residents≈ 350

Inside the perimeter there were about 24 hectares of built-up land and about 350 residents (GHSL 2025, satellite-based estimate).

This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.

Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu

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)
17 Jun 28.6 °C 27 % 43 km/h 0.0 mm Moderate 20
18 Jun 23.4 °C 48 % 24 km/h 1.2 mm Moderate 13
19 Jun 26.5 °C 36 % 31 km/h 0.0 mm High 22
20 Jun 29.6 °C 30 % 22 km/h 0.0 mm High 25
21 Jun 29.1 °C 32 % 28 km/h 0.0 mm High 32
22 Jun 31.2 °C 26 % 27 km/h 0.0 mm High 26
23 Jun 32.7 °C 34 % 28 km/h 2.0 mm Very high 38
24 Jun 31.0 °C 39 % 23 km/h 0.1 mm Moderate 16
25 Jun 31.6 °C 27 % 31 km/h 0.0 mm High 36
26 Jun 29.0 °C 35 % 38 km/h 0.0 mm Very high 43
27 Jun 28.7 °C 29 % 32 km/h 0.0 mm Very high 39
28 Jun 34.1 °C 28 % 32 km/h 0.0 mm Very high 40
29 Jun 32.1 °C 27 % 26 km/h 0.0 mm Very high 40
30 Jun after 35.4 °C 37 % 26 km/h 0.5 mm High 30
1 Jul after 33.0 °C 33 % 34 km/h 0.0 mm Very high 44
2 Jul after 33.9 °C 26 % 32 km/h 0.0 mm Very high 46
3 Jul after 34.3 °C 26 % 22 km/h 0.0 mm Very high 39
4 Jul after 24.6 °C 57 % 47 km/h 9.1 mm Low 8

Its twins: fires that started in the same weather

It started with an FWI of 19.9, a minimum humidity of 27% and rain the day before. Fires in the area that started in weather like this since 2022: 27.

FWI at the start 19.9
Minimum humidity 27 %
Days without rain 0
this fire chosen twins rest of the area
Almost identicalSimilar

Outlines of the closest twins

Beryslav fire, June 2025
363 ha 2 days FWI 18.7 Min. humidity 27 % 13 km away, in 2025

First rain (1 mm or more) after it ended: 1.5 mm on 12 Jun.

See its page Compare with this fire

What happened to them

4 days
median duration
325 ha
median area
15 %
went past 1,000 ha
1.7 mm
rain at the end (median; 21 of 27 had it)

It was 1.5 times larger than the median of its twins and lasted 13 days, against 4 days.

Only 10 of its 27 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 6 of 27, 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 1.7 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

9.1 mmfirst rain
4 Jul5 days after it ended
43km/h · max. gust

It was considered over on 29 Jun, and on 4 Jul 9.1 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 21 of 27, with a median of 1.7 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 2022.
  • 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 · 10 Jun 2026
After · 6 Jul 2026

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 1 July 2026 the air beside the fire reached 13 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak13 µg/m³
Days over the guideline0 days
PM1017 µg/m³
Optical depth0.38
20 Jun23 Jun26 Jun29 Jun
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 · 4Every 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 Oleshky fire last?
The official perimeter only gives the start date (22 June 2026). The end comes from the heat detections inside the perimeter: it burned until 29 June 2026 (13 days from 17 June 2026), the last day with detections before more than 10 days in a row without any, so it is approximate.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 500 hectares (5.0 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 3 municipalities: Beryslav (227 ha, 0.1 %); Oleshky (222 ha, 0.1 %); Bilozerka (52 ha, 0.0 %).
Did the fire reach a town?
The fire started in Oleshky and came within 23.4 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 34.1 °C, humidity dropped to 26 % and gusts hit 43 km/h. The fire danger index (FWI) reached 43, class Very 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 2022 with a similar FWI, humidity and dry spell: 27. Their median duration was 4 days and their median area 325 ha; 15 % went past 1,000 ha. Only 10 of its 27 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 6 of 27, 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 1.7 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.
  • The official perimeter has no end date: the end is the last day with VIIRS detections inside the perimeter before a gap of more than 10 days (150 days at most), so it is approximate. 4 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.
  • Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

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.