How long did the Olyokminsky Ulus fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 25 June 2024 to 22 July 2024 (28 days). The perimeter dates it from 25 June 2024 to 15 July 2024.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 19,281 hectares (192.8 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Olyokminsky Ulus (19,239 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 35.6 °C, humidity dropped to 22 % and gusts hit 44 km/h. The fire danger index (FWI) reached 36, 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 · 2024-06-25 → 2024-07-22

Olyokminsky Ulus fire, 25 June 2024 Olyokminsky Ulus

Out · last detection 23 Jul 2024, 18:55 UTC

The fire started on 25 June 2024 in Olyokminsky Ulus, Russia, and satellites saw it burning for 28 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 19,281 hectares from heat detections, spread across a single municipality.

It is the 284th largest in Sakha Republic since 2016 (of 1422 with a page). Number 76 in Russia in 2024, of 558.

Compare with…

Suggestions: Olyokminsky Ulus · 2024 Olyokminsky Ulus · 2024 Olyokminsky Ulus · 2024 Olyokminsky Ulus · 2024

Burnt area: 19,281ha; GWIS perimeter (Copernicus)
Duration: 28days; 25 Jun 2024 – 22 Jul 2024
Municipalities hit: 1; districts
Started on: 25 Jun; 2024
Heat detections: 1,910; in a single hotspot: 237 MW
Danger at start: 25; High · FWI index
Average daily power: 765MW; detected power per day, on average

HOTSPOTS BY DAY 25 Jun22 Jul

Play back 23 Jul 2024

How it evolved, day by day

25 Jun 28 Jun 1 Jul 4 Jul 7 Jul 17 Jul 22 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

36°high

44km/h · peak gust

22%lowest humidity

It had gone 8 days without rain (1 mm or more) when it started. Rain came after the fire: 3.3 mm on 29 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 12% of the area of London (193 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

Olyokminsky Ulus where it started

19,239 ha reached on 25 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)
25 Jun	30.4 °C	23 %	19 km/h	0.0 mm	High 25
26 Jun	30.9 °C	23 %	44 km/h	0.0 mm	High 36
27 Jun	25.8 °C	29 %	34 km/h	0.0 mm	High 30
28 Jun	23.9 °C	29 %	32 km/h	0.1 mm	High 29
29 Jun	26.4 °C	25 %	28 km/h	0.0 mm	High 27
30 Jun	30.3 °C	38 %	40 km/h	0.0 mm	High 28
1 Jul	35.2 °C	28 %	33 km/h	0.0 mm	High 31
2 Jul	35.6 °C	28 %	25 km/h	0.4 mm	High 30
3 Jul	27.2 °C	59 %	38 km/h	0.9 mm	Moderate 13
4 Jul	25.8 °C	32 %	28 km/h	0.1 mm	High 22
5 Jul	22.9 °C	29 %	29 km/h	0.0 mm	High 24
6 Jul	24.4 °C	35 %	21 km/h	0.0 mm	High 23
7 Jul	28.1 °C	26 %	26 km/h	0.0 mm	High 28
8 Jul	31.8 °C	22 %	32 km/h	0.0 mm	High 35
9 Jul	30.3 °C	26 %	34 km/h	0.0 mm	High 36
10 Jul	29.6 °C	23 %	31 km/h	0.0 mm	High 36
11 Jul	30.4 °C	24 %	30 km/h	0.0 mm	High 35
12 Jul	30.5 °C	28 %	26 km/h	0.0 mm	High 36
13 Jul	26.7 °C	44 %	36 km/h	1.7 mm	Moderate 13
14 Jul	23.9 °C	59 %	32 km/h	0.1 mm	Moderate 15
15 Jul	21.4 °C	61 %	25 km/h	0.1 mm	Moderate 13
16 Jul	21.9 °C	70 %	22 km/h	0.9 mm	Low 8
17 Jul	27.5 °C	51 %	33 km/h	0.5 mm	Moderate 15
18 Jul	28.2 °C	50 %	23 km/h	0.1 mm	Moderate 18
19 Jul	20.5 °C	81 %	23 km/h	4.5 mm	Very low 0
20 Jul	25.7 °C	34 %	29 km/h	0.0 mm	Low 7
21 Jul	28.9 °C	28 %	26 km/h	0.0 mm	Moderate 21
22 Jul	32.7 °C	34 %	19 km/h	0.0 mm	High 25
23 Jul after	30.4 °C	40 %	25 km/h	0.0 mm	High 26
24 Jul after	33.7 °C	30 %	28 km/h	0.0 mm	High 31
25 Jul after	35.8 °C	30 %	27 km/h	0.0 mm	High 33
26 Jul after	35.6 °C	32 %	18 km/h	0.0 mm	High 31
27 Jul after	31.1 °C	46 %	27 km/h	0.0 mm	High 26
28 Jul after	31.2 °C	44 %	20 km/h	0.0 mm	High 25
29 Jul after	26.6 °C	65 %	29 km/h	3.3 mm	Very low 4

Before and after, from space

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

↔

Before · 18 Jun 2024

After · 29 Jul 2024

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 2 July 2024 the air beside the fire reached 551 µg/m³ of PM2.5. That day averaged 354: 24 times the WHO daily guideline (15).

PM2.5 peak551 µg/m³

Days over the guideline26 days

PM10790 µg/m³

Optical depth10.53

WHO 15

2324252627282930123456789101112131415161718

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 · 1,910Every 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 Olyokminsky Ulus fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 25 June 2024 to 22 July 2024 (28 days). The perimeter dates it from 25 June 2024 to 15 July 2024.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 19,281 hectares (192.8 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Olyokminsky Ulus (19,239 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 35.6 °C, humidity dropped to 22 % and gusts hit 44 km/h. The fire danger index (FWI) reached 36, 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: 15 July 2024 → 22 July 2024.

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 25 June 2024 to 15 July 2024. 1,910 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