How long did the Upper Ket region fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 8 June 2026 to 9 July 2026 (32 days). The perimeter dates it from 8 June 2026 to 5 July 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,658 hectares (46.6 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Upper Ket region (4,699 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 31.8 °C, humidity dropped to 22 % and gusts hit 42 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 · 2026-06-08 → 2026-07-09

Upper Ket region fire, 8 June 2026 Upper Ket region

Out · last detection 9 Jul 2026, 20:21 UTC

The fire started on 8 June 2026 in Upper Ket region, Russia, and satellites saw it burning for 32 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,658 hectares from heat detections, spread across a single municipality.

It is the 17th largest in Tomsk Oblast since 2016 (of 33 with a page). Number 263 in Russia in 2026, of 420.

Compare with…

Suggestions: Upper Ket region · 2026

Burnt area: 4,658ha; GWIS perimeter (Copernicus)
Duration: 32days; 8 Jun 2026 – 9 Jul 2026
Municipalities hit: 1; districts
Started on: 8 Jun; 2026
Heat detections: 487; in a single hotspot: 162 MW
Danger at start: 22; High · FWI index
Average daily power: 182MW; detected power per day, on average

HOTSPOTS BY DAY 8 Jun9 Jul

Play back 9 Jul 2026

How it evolved, day by day

8 Jun 13 Jun 18 Jun 20 Jun 25 Jun 30 Jun 6 Jul

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

42km/h · peak gust

22%lowest humidity

It had gone 13 days without rain (1 mm or more) when it started. Rain came after the fire: 2.7 mm on 10 Jul.

This area had burned before

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

How big is it?

It burned the equivalent of 2.9% of the area of London (47 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

Upper Ket region where it started

4,699 ha reached on 8 Jun

0.1 %

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)
8 Jun	31.8 °C	25 %	20 km/h	0.6 mm	High 22
9 Jun	24.4 °C	51 %	35 km/h	2.7 mm	Very low 3
10 Jun	25.2 °C	46 %	30 km/h	0.1 mm	Low 9
11 Jun	24.4 °C	48 %	25 km/h	0.0 mm	Moderate 12
12 Jun	24.5 °C	41 %	34 km/h	0.0 mm	Moderate 15
13 Jun	25.8 °C	41 %	27 km/h	0.1 mm	Moderate 15
14 Jun	23.2 °C	53 %	30 km/h	5.6 mm	Very low 2
15 Jun	25.8 °C	29 %	31 km/h	0.0 mm	Low 9
16 Jun	27.7 °C	30 %	42 km/h	0.0 mm	Moderate 20
17 Jun	22.4 °C	25 %	38 km/h	0.0 mm	High 22
18 Jun	24.3 °C	22 %	18 km/h	0.0 mm	Moderate 21
19 Jun	26.1 °C	27 %	17 km/h	0.0 mm	Moderate 21
20 Jun	27.9 °C	26 %	16 km/h	0.0 mm	High 22
21 Jun	29.9 °C	25 %	18 km/h	0.0 mm	High 22
22 Jun	30.6 °C	26 %	21 km/h	0.0 mm	High 24
23 Jun	31.4 °C	28 %	23 km/h	0.0 mm	High 26
24 Jun	29.4 °C	38 %	28 km/h	0.5 mm	High 24
25 Jun	28.3 °C	49 %	19 km/h	2.0 mm	Low 7
26 Jun	31.1 °C	34 %	24 km/h	1.9 mm	Low 11
27 Jun	26.7 °C	44 %	26 km/h	5.4 mm	Very low 3
28 Jun	23.2 °C	62 %	21 km/h	18.9 mm	Very low 0
29 Jun	25.0 °C	57 %	22 km/h	0.2 mm	Very low 1
30 Jun	29.4 °C	33 %	18 km/h	0.0 mm	Low 9
1 Jul	25.1 °C	54 %	33 km/h	1.5 mm	Very low 5
2 Jul	22.3 °C	70 %	26 km/h	2.7 mm	Very low 1
3 Jul	27.3 °C	39 %	17 km/h	0.0 mm	Low 6
4 Jul	28.6 °C	44 %	31 km/h	5.0 mm	Very low 2
5 Jul	28.5 °C	42 %	40 km/h	0.7 mm	Low 8
6 Jul	27.6 °C	40 %	38 km/h	0.0 mm	Moderate 13
7 Jul	23.2 °C	33 %	35 km/h	0.0 mm	Moderate 14
8 Jul	18.6 °C	42 %	39 km/h	0.0 mm	Moderate 15
9 Jul	16.5 °C	47 %	33 km/h	0.0 mm	Moderate 13
10 Jul after	19.7 °C	40 %	14 km/h	2.7 mm	Very low 3

Before and after, from space

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

↔

Before · 1 Jun 2026

After · 16 Jul 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 20 June 2026 the air beside the fire reached 350 µg/m³ of PM2.5. That day averaged 199: 13 times the WHO daily guideline (15).

PM2.5 peak350 µg/m³

Days over the guideline25 days

PM10353 µg/m³

Optical depth2.75

WHO 15

678910111213141516171819202122232425262728293012345678

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 · 487Every 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

7,698 haUpper Ket region3 July 2026 · 10 days · 28 km away

All fires in Russia ›

Frequently asked questions

How long did the Upper Ket region fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 8 June 2026 to 9 July 2026 (32 days). The perimeter dates it from 8 June 2026 to 5 July 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,658 hectares (46.6 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Upper Ket region (4,699 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 31.8 °C, humidity dropped to 22 % and gusts hit 42 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 · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 5 July 2026 → 9 July 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.

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 8 June 2026 to 5 July 2026. 487 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