How long did the Dvorichna fire last?

The official perimeter only gives the start date (17 August 2026). The end comes from the heat detections inside the perimeter: it burned until 18 August 2026 (4 days from 15 August 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 328 hectares (3.3 km²). Official national figures may differ.

Which municipalities burned?

The fire only entered Dvorichna (327 ha, 0.3 %).

Did the fire reach a town?

The fire started in Dvorichna and came within 2.7 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 32.3 °C, humidity dropped to 22 % and gusts hit 35 km/h. The fire danger index (FWI) reached 33, 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.

UA · Ukraine · 2026-08-15 → 2026-08-18

Dvorichna fire, 15 August 2026 Дворічанський район · Dvorichna

Out · last detection 18 Aug 2026, 10:45 UTC

The fire started on 15 August 2026 in Dvorichna, Ukraine, and satellites saw it burning for 4 days. Copernicus mapped a burnt perimeter of 328 hectares from satellite imagery, spread across a single municipality.

It is the 107th largest in Kharkiv Oblast since 2016 (of 558 with a page). Number 254 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: Dvorichna · 2024 Dvorichna · 2024 Dvorichna · 2024 Dvorichna · 2024

Burnt area: 328ha; Copernicus perimeter
Duration: ≈ 4days; 15 Aug 2026 – 18 Aug 2026
Municipalities hit: 1; districts
Started on: 15 Aug; 2026
Heat detections: 10; in a single hotspot: 10 MW
Danger at start: 22; High · FWI index
Average daily power: 22MW; detected power per day, on average

HOTSPOTS BY DAY 15 Aug18 Aug

Play back 18 Aug 2026

How it evolved, day by day

16 Aug 17 Aug 18 Aug

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

The weather it burned in

32°high

35km/h · peak gust

22%lowest humidity

It had gone 6 days without rain (1 mm or more) when it started. Rain came after the fire: 2.7 mm on 27 Aug.

This area had burned before

66% of the perimeter overlaps earlier fires recorded since 2016: 306 ha in 2024, 2 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 218 ha that had burned before.

What happened to each town

Dvorichna Дворічанський район 2.7 km from the centre where it started

327 ha reached on 16 Aug

0.3 %

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 areas75 %
Other natural land14 %
Mixed forest11 %

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)
15 Aug	24.1 °C	28 %	32 km/h	0.0 mm	High 22
16 Aug	28.9 °C	32 %	32 km/h	0.0 mm	High 23
17 Aug	30.6 °C	28 %	35 km/h	0.0 mm	High 27
18 Aug	32.3 °C	22 %	34 km/h	0.0 mm	High 33
19 Aug after	22.7 °C	53 %	27 km/h	0.0 mm	Moderate 21
20 Aug after	27.6 °C	30 %	32 km/h	0.0 mm	High 25
21 Aug after	32.9 °C	30 %	44 km/h	0.0 mm	High 34
22 Aug after	34.0 °C	26 %	28 km/h	0.0 mm	High 30
23 Aug after	34.3 °C	20 %	37 km/h	0.0 mm	Very high 43
24 Aug after	25.9 °C	29 %	41 km/h	0.0 mm	High 38
25 Aug after	25.4 °C	26 %	40 km/h	0.0 mm	High 37
26 Aug after	26.1 °C	35 %	20 km/h	0.0 mm	High 27
27 Aug after	19.0 °C	62 %	27 km/h	2.7 mm	Very low 5

Before and after, from space

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

↔

Before · 8 Aug 2026

After · 25 Aug 2026

Before After

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 18 August 2026 the air beside the fire reached 12 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak12 µg/m³

Days over the guideline0 days

PM1016 µg/m³

Optical depth0.42

151617181920

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 · 10Every 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 time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in Ukraine ›

Frequently asked questions

How long did the Dvorichna fire last?: The official perimeter only gives the start date (17 August 2026). The end comes from the heat detections inside the perimeter: it burned until 18 August 2026 (4 days from 15 August 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 328 hectares (3.3 km²). Official national figures may differ.
Which municipalities burned?: The fire only entered Dvorichna (327 ha, 0.3 %).
Did the fire reach a town?: The fire started in Dvorichna and came within 2.7 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 32.3 °C, humidity dropped to 22 % and gusts hit 35 km/h. The fire danger index (FWI) reached 33, 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 ›

ДСНС · State Emergency Service ↗

Satellite cross-check

NASA FIRMS ↗
EFFIS · Copernicus ↗

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

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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.

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What really happened?

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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. 10 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.

Where it burned