Burned area
satellite only1,652ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 28 Oct 2026 – 5 Nov 2026
+− cross-check
No official record is matched to this page to compare it with.
CN · China · –
Lan County fire, October 2026 岚县 · Lan County
Dying down · last detection 5 Nov 2026, 05:20 UTC
The fire started on 28 October 2026 in Lan County, China, and satellites saw it burning for 9 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,652 hectares from heat detections, spread across a single municipality.
Number 557 in China in 2026, of 1101.
GWIS near-real-time perimeter, from the layer that changed in October 2025: this fire is not compared with fires from earlier years, because since then the GWIS layer gives more and larger perimeters.
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Fire page data · version 2026-11-05matches 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 only9days
From 28 Oct 2026 to today: still being detected.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 5 Nov 2026, 05:20 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 only28 Oct 2026
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 28 Oct 2026
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only25
VIIRS detections at 375 m. Most intense hotspot: 34 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP + NOAA-20)
- Date
- 28 Oct 2026 – 5 Nov 2026
+− 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 only129MW
Total radiative power on 4 November 2026; hotspots that day: 15.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 4 Nov 2026
+− 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
model4.1FWI · very low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 2.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 28 Oct 2026, local noon
- Model
- ECMWF IFS 0,25° · Open-Meteo.com · provisional
+− 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
model13.2°C · 22% RH
High of 13.2 °C and minimum humidity of 22% on 3 November 2026; gusts of 68 km/h on 29 October 2026.
- Source
- weather model at the fire’s grid cell
- Date
- 28 Oct 2026 – 5 Nov 2026
- Model
- ECMWF IFS 0,25° · Open-Meteo.com · provisional
+− 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.
Living inside
model≈ 1,400people
Estimated residents inside the perimeter and 9.3 ha of built-up area (100 m grid, epoch 2025).
- Source
- GHSL R2023A · JRC
- Date
- calculated on 4 November 2026
+− cross-check
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.
This page’s change log has been kept since 4 November 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
-
logArea: 1,162 → 1,652 ha.
-
· reconstructed weatherWeather and FWI computed from the forecast (provisional until ERA5 arrives)
-
logPage published (1,162 ha).
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 5 November 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
- 1,652 ha
- Dates
- 28 Oct 2026 – ongoing
- Name
- Lan County
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/lan-county-2026-10?v=2026-11-05A 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 lan-county-2026-10.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-28 | 0 | 0 | 10.6 | -2.5 | 35 | 18.6 | 48.6 | 0 | 4.1 | muy_bajo | 1 |
| 2026-10-29 | 0 | 0 | 9.3 | -1.1 | 28 | 28.7 | 67.7 | 0 | 13.3 | moderado | 1 |
| 2026-10-30 | 3 | 77 | 11.8 | 0.1 | 17 | 22.1 | 50.8 | 0 | 16.3 | moderado | 1 |
| 2026-10-31 | 0 | 0 | 12.3 | 1.1 | 25 | 21.1 | 49.7 | 0.9 | 8.7 | bajo | 1 |
| 2026-11-01 | 4 | 29 | 7.3 | -0.3 | 24 | 25.4 | 59 | 0 | 9 | bajo | 1 |
| 2026-11-02 | 0 | 0 | 10 | 0.3 | 21 | 21.7 | 52.2 | 0 | 15.1 | moderado | 1 |
| 2026-11-03 | 1 | 6 | 13.2 | -0.7 | 22 | 8 | 23.4 | 0 | 7.2 | bajo | 1 |
| 2026-11-04 | 15 | 129 | 11.4 | 1.9 | 29 | 17.9 | 43.9 | 0.1 | 13.8 | moderado | 1 |
| 2026-11-05 | 2 | 13 | 8.3 | -0.6 | 24 | 28.6 | 64.8 | 0 | 21.5 | alto | 1 |
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), ECMWF IFS · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
Is it still active?
No detections since 5 Nov 2026, 05:20 UTC. That usually means no flame is visible from space any more, although hotspots may remain. 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.
- Burnt area
- 1,652ha
- GWIS perimeter (Copernicus)
- Duration
- 9days
- 28 Oct 2026 – 5 Nov 2026
- Municipalities hit
- 1
- counties
- Started on
- 28 Oct
- 2026
- Heat detections
- 25
- in a single hotspot: 34 MW
- Danger at start
- 4
- Very low · FWI index
- Average daily power
- 51MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
28 Oct5 Nov
5 Nov 2026
How it evolved, day by day
28 Oct
31 Oct
2 Nov
4 Nov
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
13°high
68km/h · peak gust
17%lowest humidity
It had gone 2 days without rain (1 mm or more) when it started.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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
-
1,653 ha reached on 28 Oct1.1 %
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 2025Built-up area9.3 ha
Residents≈ 1,400
Inside the perimeter there were about 9.3 hectares of built-up land and about 1,400 residents (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) · forecast models, provisional until the ERA5 reanalysis arrives
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 28 Oct | 10.6 °C | 35 % | 49 km/h | 0.0 mm | Very low 4 |
| 29 Oct | 9.3 °C | 28 % | 68 km/h | 0.0 mm | Moderate 13 |
| 30 Oct | 11.8 °C | 17 % | 51 km/h | 0.0 mm | Moderate 16 |
| 31 Oct | 12.3 °C | 25 % | 50 km/h | 0.9 mm | Low 9 |
| 1 Nov | 7.3 °C | 24 % | 59 km/h | 0.0 mm | Low 9 |
| 2 Nov | 10.0 °C | 21 % | 52 km/h | 0.0 mm | Moderate 15 |
| 3 Nov | 13.2 °C | 22 % | 23 km/h | 0.0 mm | Low 7 |
| 4 Nov | 11.4 °C | 29 % | 44 km/h | 0.1 mm | Moderate 14 |
| 5 Nov | 8.3 °C | 24 % | 65 km/h | 0.0 mm | High 22 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 21 Oct 2026
After · 5 Nov 2026
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 1 November 2026 the air beside the fire reached 94 µg/m³ of PM2.5. That day averaged 33: 2.2 times the WHO daily guideline (15).
PM2.5 peak94 µg/m³
Days over the guideline5 days
PM10313 µg/m³
Optical depth0.34
WHO 15
26 Oct28 Oct30 Oct1 Nov3 Nov
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 · 25Every 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 |
|---|
Frequently asked questions
- How long did the Lan County fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 28 October 2026 to 5 November 2026 (9 days). The perimeter dates it from 28 October 2026 to 4 November 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,652 hectares (16.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Lan County (1,653 ha, 1.1 %).
- Is the Lan County fire still active?
- No fire detections since 5 Nov 2026, 05:20 UTC. A lack of detections is not an official extinction.
- What was the weather like?
- During the fire the temperature reached 13.2 °C, humidity dropped to 17 % and gusts hit 68 km/h. The fire danger index (FWI) reached 22, 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 4 November 2026.
- Area: 1,162 → 1,652 ha.
- Page published (1,162 ha).
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 28 October 2026 to 4 November 2026. 25 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: ECMWF IFS model, provisional until the ERA5 reanalysis arrives.
- 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.
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.