Burned area
satellite only1,292ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 24 Oct 2022 – 27 Oct 2022
+− cross-check
No official record is matched to this page to compare it with.
CN · China · –
Hunyuan County fire, October 2022 浑源县 · Hunyuan County
Out · last measured on 27 Oct 2022
The fire started on 24 October 2022 in Hunyuan County, China, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,292 hectares from heat detections, spread across a single municipality.
This entry is very probably agricultural burning of stubble or straw that the satellite has merged into a single perimeter, not a wildfire in natural vegetation. We reviewed it by hand: the perimeter comes only from GWIS, lies on densely populated farmland and matches the season when stubble is burnt after the harvest. That is why it is not included in the wildfire rankings.
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Fire page data · version 2026-10-24matches 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 only4days
24 Oct 2022 to 27 Oct 2022: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 24 Oct 2022 – 27 Oct 2022
+− 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 Oct 2022
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 24 Oct 2022
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Danger at the start
model24.7FWI · high
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 20.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 24 Oct 2022, 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
model19.5°C · 27% RH
High of 19.5 °C and minimum humidity of 27% on 25 October 2022; gusts of 33 km/h on 26 October 2022.
- Source
- weather model at the fire’s grid cell
- Date
- 24 Oct 2022 – 27 Oct 2022
- 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
What was saved on 24 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
- 1,292 ha
- Dates
- 24 Oct 2022 – 27 Oct 2022
- Name
- Hunyuan County
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/hunyuan-county-2022-10?v=2026-10-24A 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 hunyuan-county-2022-10.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022-10-24 | 0 | 0 | 18.8 | 1.9 | 15 | 10.5 | 29.5 | 0 | 24.7 | alto | 1 |
| 2022-10-25 | 0 | 0 | 19.5 | 4.1 | 27 | 11.3 | 31.7 | 0 | 21.5 | alto | 1 |
| 2022-10-26 | 0 | 0 | 14.3 | 8.2 | 39 | 13.1 | 32.8 | 0 | 19.6 | moderado | 1 |
| 2022-10-27 | 0 | 0 | 11.5 | 6.1 | 45 | 8 | 21.6 | 0 | 8.5 | bajo | 1 |
| 2022-10-28 | 0 | 0 | 15.6 | 4.1 | 47 | 7.3 | 19.8 | 0 | 7.5 | bajo | 0 |
| 2022-10-29 | 0 | 0 | 9.1 | 6.6 | 78 | 8.2 | 23.8 | 1.8 | 4.1 | muy_bajo | 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). Open-Meteo.com · How we build fire pages: methodology
We have the GWIS perimeter for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by municipality is there.
- Burnt area
- 1,292ha
- GWIS perimeter (Copernicus)
- Duration
- 4days
- 24 Oct 2022 – 27 Oct 2022
- Municipalities hit
- 1
- counties
- Started on
- 24 Oct
- 2022
- Danger at start
- 25
- High · FWI index
Where it burned
The weather it burned in
20°high
33km/h · peak gust
15%lowest humidity
It had gone 20 days without rain (1 mm or more) when it started. Rain came after the fire: 1.8 mm on 29 Oct.
This area had burned before
57% of the perimeter overlaps earlier fires recorded since 2016: 264 ha in 2016, 82 ha in 2019, 736 ha in 2020, 11 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 733 ha that had burned before.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Beijing (Dongcheng and Xicheng) boundary: geoBoundaries · Lee Beryman, OpenStreetMap · © 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
-
1,296 ha0.7 %
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.
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 Oct | 18.8 °C | 15 % | 30 km/h | 0.0 mm | High 25 |
| 25 Oct | 19.5 °C | 27 % | 32 km/h | 0.0 mm | High 22 |
| 26 Oct | 14.3 °C | 39 % | 33 km/h | 0.0 mm | Moderate 20 |
| 27 Oct | 11.5 °C | 45 % | 22 km/h | 0.0 mm | Low 8 |
| 28 Oct after | 15.6 °C | 47 % | 20 km/h | 0.0 mm | Low 8 |
| 29 Oct after | 9.1 °C | 78 % | 24 km/h | 1.8 mm | Very low 4 |
Its twins: fires that started in the same weather
It started with an FWI of 24.7, a minimum humidity of 15% and 20 days without rain. Fires in the area that started in weather like this since 2016: 8.
FWI at the start
24.7
Minimum humidity
15 %
Days without rain
20
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Hunyuan County fire, October 2022
1,292 ha
4 days
FWI 24.7
Min. humidity 15 %
Horinger fire, April 2020
1,051 ha
2 days
FWI 17.2
Min. humidity 15 %
197 km away, in 2020
First rain (1 mm or more) after it ended: 1.6 mm on 18 Apr.
Laiyuan County fire, March 2023
2,443 ha
2 days
FWI 14.8
Min. humidity 13 %
91 km away, in 2023
First rain (1 mm or more) after it ended: 2.3 mm on 17 Mar.
Pingding County fire, February 2021
2,552 ha
1 day
FWI 28.7
Min. humidity 8 %
231 km away, in 2021
First rain (1 mm or more) after it ended: 18.5 mm on 28 Feb.
Jiaoqu District fire, March 2019
1,218 ha
5 days
FWI 15.2
Min. humidity 11 %
204 km away, in 2019
First rain (1 mm or more) after it ended: 3.3 mm on 20 Mar.
Horinger fire, October 2019
1,227 ha
3 days
FWI 16.9
Min. humidity 13 %
206 km away, in 2019
First rain (1 mm or more) after it ended: 5.7 mm on 1 Nov.
What happened to them
Fires in the area that started in similar weather: 8. 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
1.8 mmfirst rain
29 Oct2 days after it ended
33km/h · max. gust
It was considered over on 27 Oct, and on 29 Oct 1.8 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 Oct 2022
After · 3 Nov 2022
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.
The smoke
CAMS · CopernicusOn 25 October 2022 the air beside the fire reached 49 µg/m³ of PM2.5. That day averaged 41: 2.7 times the WHO daily guideline (15).
PM2.5 peak49 µg/m³
Days over the guideline8 days
PM10100 µg/m³
Optical depth1.02
WHO 15
22 Oct24 Oct26 Oct28 Oct30 Oct
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)
Other fires nearby
- 1,540 haHunyuan County 浑源县October 2021 · 9 days · 19 km away
- 5,313 haHunyuan County 浑源县20 October 2026 · 5 days · 25 km away
- 13,246 haHunyuan County 浑源县October 2025 · 11 days · 28 km away
- 2,304 haDatong County20 February 2026 · 2 days · 30 km away
- 3,198 haDatong County21 February 2026 · 1 day · 36 km away
- 3,277 haYanggao County 阳高县February 2026 · 13 days · 37 km away
Frequently asked questions
- How long did the Hunyuan County fire last?
- GWIS (Copernicus) dates it between 24 October 2022 and 27 October 2022: 4 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,292 hectares (12.9 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Hunyuan County (1,296 ha, 0.7 %).
- What was the weather like?
- During the fire the temperature reached 19.5 °C, humidity dropped to 15 % and gusts hit 33 km/h. The fire danger index (FWI) reached 25, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of China (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: 119 · Emergency number and official warnings
Satellite cross-check
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 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 from the perimeter: the VIIRS detections inside it did not change them. No 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.
- Probably a vegetation burn: not counted in the totals.
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 ADM3 (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.