How long did the Derhachi fire last?

Copernicus dates it between 12 October 2023 and 12 October 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 306 hectares (3.1 km²). Official national figures may differ.

Which municipalities burned?

The fire only entered Derhachi (306 ha, 0.6 %).

Did the fire reach a town?

The fire started in Derhachi and came within 7.7 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 15.7 °C, humidity dropped to 45 % and gusts hit 59 km/h. The fire danger index (FWI) reached 16, 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.

UA · Ukraine · 2023-10-12 → 2023-10-12

Derhachi fire, October 2023 Дергачівський район · Derhachi

Out · last detection 12 Oct 2023, 10:53 UTC

The fire started on 12 October 2023 in Derhachi, Ukraine, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 306 hectares from satellite imagery, spread across a single municipality.

It is the 115th largest in Kharkiv Oblast since 2016 (of 558 with a page). Number 140 in Ukraine in 2023, of 491.

Compare with…

Suggestions: Zolochiv · 2024 Kharkiv · 2024 Kharkiv · 2024 Kharkiv · 2024

Burnt area: 306ha; Copernicus perimeter
Duration: 1day; 12 Oct 2023 – 12 Oct 2023
Municipalities hit: 1; districts
Started on: 12 Oct; 2023
Heat detections: 11; in a single hotspot: 55 MW
Danger at start: 16; Moderate · FWI index
Average daily power: 118MW; detected power per day, on average

HOTSPOTS BY DAY 12 Oct12 Oct

How it evolved, day by day

12 Oct 2023 · 118 MW · 11

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

The weather it burned in

16°high

59km/h · peak gust

45%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 12.8 mm on 16 Oct.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

Derhachi Дергачівський район 94,574 inhabitants · 7.7 km from the centre where it started

306 ha reached on 12 Oct

0.6 %

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 areas79 %
Mixed forest11 %
Other natural land11 %

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)
12 Oct	15.7 °C	45 %	59 km/h	0.0 mm	Moderate 16
13 Oct after	15.5 °C	70 %	45 km/h	0.9 mm	Low 8
14 Oct after	17.4 °C	63 %	34 km/h	0.0 mm	Low 8
15 Oct after	19.7 °C	48 %	40 km/h	0.0 mm	Moderate 13
16 Oct after	12.5 °C	75 %	55 km/h	12.8 mm	Very low 0

Before and after, from space

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

↔

Before · 5 Oct 2023

After · 19 Oct 2023

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 14 October 2023 the air beside the fire reached 26 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak26 µg/m³

Days over the guideline0 days

PM1033 µg/m³

Optical depth0.28

WHO 15

101112131415

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 · 11Every 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 Derhachi fire last?: Copernicus dates it between 12 October 2023 and 12 October 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 306 hectares (3.1 km²). Official national figures may differ.
Which municipalities burned?: The fire only entered Derhachi (306 ha, 0.6 %).
Did the fire reach a town?: The fire started in Derhachi and came within 7.7 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 15.7 °C, humidity dropped to 45 % and gusts hit 59 km/h. The fire danger index (FWI) reached 16, 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 · 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

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.

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What do you think is wrong?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

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.
Dates from the perimeter: the VIIRS detections inside it did not change them. 11 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