Burned area
satellite only12,844ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 24 Aug 2021 – 14 Sept 2021
+− cross-check
No official record is matched to this page to compare it with.
RU · Russia · –
Kunashaksky District fire, 24 August 2021 Kunashaksky District, Kataysky District, Krasnoarmeysky District
Out · last detection 14 Sept 2021, 23:16 UTC
The fire started on 24 August 2021 in Kunashaksky District, Russia, and satellites saw it burning for 22 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,844 hectares from heat detections, spread across 3 municipalities.
It is the 3th largest in Chelyabinsk Oblast since 2016 (of 11 with a page). Number 135 in Russia in 2021, of 581.
Use this data
Fire page data · version 2026-10-25matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only22days
24 Aug 2021 to 14 Sept 2021: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 14 Sept 2021, 23:16 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only24 Aug 2021
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 24 Aug 2021
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only1,616
VIIRS detections at 375 m. Most intense hotspot: 84 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 24 Aug 2021 – 14 Sept 2021
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only8,680MW
Total radiative power on 3 September 2021; hotspots that day: 963.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 3 Sept 2021
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model42.0FWI · very high
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 23.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 24 Aug 2021, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model34.5°C · 18% RH
High of 34.5 °C and minimum humidity of 18% on 24 August 2021; gusts of 62 km/h on 4 September 2021.
- Source
- weather model at the fire’s grid cell
- Date
- 24 Aug 2021 – 14 Sept 2021
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
logLast day with fire: 8 September 2021 → 14 September 2021.
-
logStart date: 30 August 2021 → 24 August 2021.
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 25 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 12,844 ha
- Dates
- 24 Aug 2021 – 14 Sept 2021
- Name
- Kunashaksky District
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/kunashaksky-district-2021-08-3?v=2026-10-25A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire kunashaksky-district-2021-08-3.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-08-24 | 78 | 1,425 | 34.5 | 18.8 | 18 | 17.5 | 36.4 | 0 | 42 | muy_alto | 1 |
| 2021-08-25 | 76 | 554 | 33.3 | 18 | 21 | 19.3 | 36.4 | 0 | 39.6 | muy_alto | 1 |
| 2021-08-26 | 8 | 11 | 31.5 | 19.5 | 30 | 16.4 | 25.2 | 1.4 | 30.6 | alto | 1 |
| 2021-08-27 | 21 | 97 | 21.3 | 15.2 | 47 | 18.2 | 40.7 | 2.2 | 16.7 | moderado | 1 |
| 2021-08-28 | 20 | 119 | 15.1 | 10.4 | 45 | 18.5 | 37.4 | 0 | 8.9 | bajo | 1 |
| 2021-08-29 | 44 | 205 | 18 | 6.8 | 34 | 9.7 | 27 | 0 | 12.5 | moderado | 1 |
| 2021-08-30 | 21 | 140 | 19.5 | 5.5 | 30 | 15.8 | 33.1 | 0 | 22.2 | alto | 1 |
| 2021-08-31 | 0 | 0 | 13.5 | 8.5 | 44 | 11 | 26.3 | 0 | 19.4 | moderado | 1 |
| 2021-09-01 | 5 | 4 | 17.4 | 5.7 | 43 | 14.7 | 32.8 | 0 | 23.1 | alto | 1 |
| 2021-09-02 | 1 | 11 | 27.8 | 9.7 | 30 | 24.1 | 47.5 | 0 | 30.7 | alto | 1 |
| 2021-09-03 | 963 | 8,680 | 27.2 | 17.3 | 25 | 24.1 | 49 | 0 | 46.8 | muy_alto | 1 |
| 2021-09-04 | 242 | 481 | 22.7 | 12.9 | 35 | 25.6 | 62.3 | 1.6 | 33.2 | alto | 1 |
| 2021-09-05 | 43 | 160 | 16.9 | 9.3 | 31 | 19.5 | 43.2 | 0 | 11.2 | moderado | 1 |
| 2021-09-06 | 34 | 159 | 15.6 | 4.9 | 33 | 19.4 | 41 | 0 | 20.7 | moderado | 1 |
| 2021-09-07 | 48 | 169 | 14.3 | 5 | 37 | 15.5 | 33.5 | 0 | 16.6 | moderado | 1 |
| 2021-09-08 | 6 | 37 | 12.3 | 3.3 | 47 | 26.1 | 54 | 0.7 | 27.3 | alto | 1 |
| 2021-09-09 | 0 | 0 | 15.7 | 8 | 50 | 23.2 | 44.6 | 1.3 | 21.2 | moderado | 1 |
| 2021-09-10 | 0 | 0 | 13.5 | 7.2 | 49 | 25.3 | 55.8 | 3.2 | 6.1 | bajo | 1 |
| 2021-09-11 | 1 | 2 | 11.2 | 4.5 | 38 | 28.6 | 55.8 | 0 | 13.9 | moderado | 1 |
| 2021-09-12 | 1 | 2 | 13.5 | 2.7 | 43 | 24.8 | 61.2 | 0.1 | 19.6 | moderado | 1 |
| 2021-09-13 | 2 | 9 | 14.6 | 2.5 | 46 | 14.9 | 28.8 | 0 | 15 | moderado | 1 |
| 2021-09-14 | 2 | 3 | 22.8 | 7.2 | 48 | 21 | 45.7 | 0.6 | 21 | moderado | 1 |
| 2021-09-15 | 0 | 0 | 21.7 | 11.1 | 38 | 14.8 | 34.9 | 2.1 | 19.7 | moderado | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 12,844ha
- GWIS perimeter (Copernicus)
- Duration
- 22days
- 24 Aug 2021 – 14 Sept 2021
- Municipalities hit
- 3
- districts
- Started on
- 24 Aug
- 2021
- Heat detections
- 1,616
- in a single hotspot: 84 MW
- Danger at start
- 42
- Very high · FWI index
- Average daily power
- 646MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
24 Aug14 Sept
14 Sept 2021
How it evolved, day by day
24 Aug
28 Aug
3 Sept
6 Sept
12 Sept
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
34°high
62km/h · peak gust
18%lowest humidity
It had gone 23 days without rain (1 mm or more) when it started. Rain came after the fire: 2.1 mm on 15 Sept.
This area had burned before
23% of the perimeter overlaps earlier fires recorded since 2016: 1,813 ha in 2017, 1,683 ha in 2018, 162 ha in 2019. Part of it burned more than once, so the yearly figures add up to more than the 2,987 ha that had burned before.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Moscow boundary: geoBoundaries · OpenStreetMap, Wambacher · © OpenStreetMap contributors (ODbL 1.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Kunashaksky District where it started5,535 ha reached on 24 Aug1.7 %
-
3,766 ha reached on 24 Aug1.4 %
-
3,554 ha reached on 30 Aug0.9 %
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 2020Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, 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.
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) |
|---|---|---|---|---|---|
| 24 Aug | 34.5 °C | 18 % | 36 km/h | 0.0 mm | Very high 42 |
| 25 Aug | 33.3 °C | 21 % | 36 km/h | 0.0 mm | Very high 40 |
| 26 Aug | 31.5 °C | 30 % | 25 km/h | 1.4 mm | High 31 |
| 27 Aug | 21.3 °C | 47 % | 41 km/h | 2.2 mm | Moderate 17 |
| 28 Aug | 15.1 °C | 45 % | 37 km/h | 0.0 mm | Low 9 |
| 29 Aug | 18.0 °C | 34 % | 27 km/h | 0.0 mm | Moderate 12 |
| 30 Aug | 19.5 °C | 30 % | 33 km/h | 0.0 mm | High 22 |
| 31 Aug | 13.5 °C | 44 % | 26 km/h | 0.0 mm | Moderate 19 |
| 1 Sept | 17.4 °C | 43 % | 33 km/h | 0.0 mm | High 23 |
| 2 Sept | 27.8 °C | 30 % | 48 km/h | 0.0 mm | High 31 |
| 3 Sept | 27.2 °C | 25 % | 49 km/h | 0.0 mm | Very high 47 |
| 4 Sept | 22.7 °C | 35 % | 62 km/h | 1.6 mm | High 33 |
| 5 Sept | 16.9 °C | 31 % | 43 km/h | 0.0 mm | Moderate 11 |
| 6 Sept | 15.6 °C | 33 % | 41 km/h | 0.0 mm | Moderate 21 |
| 7 Sept | 14.3 °C | 37 % | 34 km/h | 0.0 mm | Moderate 17 |
| 8 Sept | 12.3 °C | 47 % | 54 km/h | 0.7 mm | High 27 |
| 9 Sept | 15.7 °C | 50 % | 45 km/h | 1.3 mm | Moderate 21 |
| 10 Sept | 13.5 °C | 49 % | 56 km/h | 3.2 mm | Low 6 |
| 11 Sept | 11.2 °C | 38 % | 56 km/h | 0.0 mm | Moderate 14 |
| 12 Sept | 13.5 °C | 43 % | 61 km/h | 0.1 mm | Moderate 20 |
| 13 Sept | 14.6 °C | 46 % | 29 km/h | 0.0 mm | Moderate 15 |
| 14 Sept | 22.8 °C | 48 % | 46 km/h | 0.6 mm | Moderate 21 |
| 15 Sept after | 21.7 °C | 38 % | 35 km/h | 2.1 mm | Moderate 20 |
Its twins: fires that started in the same weather
It started with an FWI of 42.0, a minimum humidity of 18% and 23 days without rain. Fires in the area that started in weather like this since 2016: 11.
FWI at the start
42.0
Minimum humidity
18 %
Days without rain
23
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Kunashaksky District fire, 24 August 2021
12,844 ha
22 days
FWI 42.0
Min. humidity 18 %
Kamyshlovsky District fire, May 2023
5,487 ha
4 days
FWI 47.5
Min. humidity 15 %
77 km away, in 2023
First rain (1 mm or more) after it ended: none in the following ten days.
Shatrovsky District fire, May 2023
4,101 ha
8 days
FWI 43.7
Min. humidity 13 %
145 km away, in 2023
First rain (1 mm or more) after it ended: none in the following ten days.
Mishkinsky District fire, July 2020
4,220 ha
8 days
FWI 38.9
Min. humidity 22 %
138 km away, in 2020
First rain (1 mm or more) after it ended: 1.5 mm on 8 Aug.
Talitsky District fire, May 2023
6,014 ha
6 days
FWI 40.6
Min. humidity 10 %
124 km away, in 2023
First rain (1 mm or more) after it ended: none in the following ten days.
Talitsky District fire, May 2021
6,683 ha
14 days
FWI 40.3
Min. humidity 11 %
133 km away, in 2021
First rain (1 mm or more) after it ended: none in the following ten days.
What happened to them
Fires in the area that started in similar weather: 11. With fewer than 15 we give no figures: they would be more noise than signal.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
2.1 mmfirst rain
15 Septthe day after it ended
62km/h · max. gust
It was considered over on 14 Sept, and on 15 Sept 2.1 mm fell. We do not know whether the rain or the firefighters put it out.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2016.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 17 Aug 2021
After · 21 Sept 2021
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
Detections table · 1,616Every 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
Frequently asked questions
- How long did the Kunashaksky District fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 24 August 2021 to 14 September 2021 (22 days). The perimeter dates it from 30 August 2021 to 8 September 2021.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,844 hectares (128.4 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Kunashaksky District (5,535 ha, 1.7 %); Kataysky District (3,766 ha, 1.4 %); Krasnoarmeysky District (3,554 ha, 0.9 %).
- What was the weather like?
- During the fire the temperature reached 34.5 °C, humidity dropped to 18 % and gusts hit 62 km/h. The fire danger index (FWI) reached 47, class Very 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
History of this page · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 8 September 2021 → 14 September 2021.
- Start date: 30 August 2021 → 24 August 2021.
RSS Changes to this page With cross-checks and a citable version
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
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 30 August 2021 to 8 September 2021. 1,616 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 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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.