How long did the Bolsheukovsky District fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 27 April 2023 to 4 May 2023 (8 days). The perimeter dates it from 28 April 2023 to 29 April 2023.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 6,931 hectares (69.3 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Bolsheukovsky District (6,870 ha, 0.7 %).

What was the weather like?

During the fire the temperature reached 25.2 °C, humidity dropped to 9 % and gusts hit 68 km/h. The fire danger index (FWI) reached 26, class High.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Russia (geoBoundaries). It is not an official report.

RU · Russia · 2023-04-27 → 2023-05-04

Bolsheukovsky District fire, 27 April 2023 Bolsheukovsky District

Out · last detection 4 May 2023, 21:42 UTC

The fire started on 27 April 2023 in Bolsheukovsky District, Russia, and satellites saw it burning for 8 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,931 hectares from heat detections, spread across a single municipality.

It is the 50th largest in Omsk Oblast since 2016 (of 153 with a page). Number 159 in Russia in 2023, of 450.

Compare with…

Suggestions: Bolsheukovsky District · 2021 Bolsheukovsky District · 2022 Bolsheukovsky District · 2020 Bolsheukovsky District · 2023

Burnt area: 6,931ha; GWIS perimeter (Copernicus)
Duration: 8days; 27 Apr 2023 – 4 May 2023
Municipalities hit: 1; districts
Started on: 27 Apr; 2023
Heat detections: 436; in a single hotspot: 100 MW
Danger at start: 21; Moderate · FWI index
Average daily power: 411MW; detected power per day, on average

HOTSPOTS BY DAY 27 Apr4 May

Play back 4 May 2023

How it evolved, day by day

27 Apr 29 Apr 1 May 3 May

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

The weather it burned in

25°high

68km/h · peak gust

9%lowest humidity

It had gone 2 days without rain (1 mm or more) when it started.

This area had burned before

51% of the perimeter overlaps earlier fires recorded since 2016: 1,593 ha in 2018, 12 ha in 2020, 1,982 ha in 2021, 1,128 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 3,546 ha that had burned before.

1,035 ha Bolsheukovsky District fire, April 2021 19,538 ha in total; the hectares shown are those it shares with this fire

How big is it?

It burned the equivalent of 4.4% of the area of London (69 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

Bolsheukovsky District where it started

6,870 ha reached on 27 Apr

0.7 %

Burnt area inside each municipality, from crossing the GWIS 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.

People and buildings inside the perimeter

GHSL 2025

Built-up area< 0.1 ha

Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (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)
27 Apr	24.9 °C	18 %	50 km/h	0.0 mm	Moderate 21
28 Apr	21.7 °C	27 %	68 km/h	0.0 mm	High 26
29 Apr	10.0 °C	24 %	49 km/h	0.0 mm	Moderate 18
30 Apr	5.2 °C	41 %	53 km/h	0.0 mm	Moderate 15
1 May	9.1 °C	27 %	46 km/h	0.0 mm	Moderate 14
2 May	13.6 °C	20 %	23 km/h	0.0 mm	Moderate 11
3 May	17.4 °C	14 %	31 km/h	0.0 mm	Moderate 17
4 May	25.2 °C	9 %	40 km/h	0.0 mm	High 26
5 May after	25.5 °C	8 %	43 km/h	0.0 mm	High 30
6 May after	26.6 °C	6 %	33 km/h	0.0 mm	High 29
7 May after	28.2 °C	8 %	37 km/h	0.0 mm	High 36
8 May after	19.7 °C	17 %	45 km/h	0.0 mm	High 34
9 May after	10.0 °C	26 %	43 km/h	0.0 mm	High 26
10 May after	13.8 °C	19 %	28 km/h	0.0 mm	Moderate 21
11 May after	16.8 °C	20 %	41 km/h	0.1 mm	High 28
12 May after	10.6 °C	24 %	35 km/h	0.1 mm	High 22
13 May after	12.8 °C	22 %	41 km/h	0.0 mm	High 25
14 May after	17.5 °C	19 %	37 km/h	0.0 mm	High 24

Before and after, from space

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

↔

Before · 20 Apr 2023

After · 11 May 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 29 April 2023 the air beside the fire reached 93 µg/m³ of PM2.5. That day averaged 30: 2.0 times the WHO daily guideline (15).

PM2.5 peak93 µg/m³

Days over the guideline4 days

PM10133 µg/m³

Optical depth0.50

WHO 15

262728293012

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 · 436Every 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 Russia ›

Frequently asked questions

How long did the Bolsheukovsky District fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 27 April 2023 to 4 May 2023 (8 days). The perimeter dates it from 28 April 2023 to 29 April 2023.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 6,931 hectares (69.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Bolsheukovsky District (6,870 ha, 0.7 %).
What was the weather like?: During the fire the temperature reached 25.2 °C, humidity dropped to 9 % and gusts hit 68 km/h. The fire danger index (FWI) reached 26, class High.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Russia (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: 112 · Emergency number and official warnings ›

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 29 April 2023 → 4 May 2023.
25 October 2026 Start date: 28 April 2023 → 27 April 2023.

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?

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

What really happened?

Your connection to the fire (optional) Email (optional)

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 112.

How we know this

Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
Dates adjusted with the VIIRS detections inside the perimeter, which said 28 April 2023 to 29 April 2023. 436 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 comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. 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 (Open Data Commons Open Database License 1.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.

Where it burned