Powys fire, 21 March 2022 Powys, Carmarthenshire
The fire started on 21 March 2022 in Powys, United Kingdom, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 1,089 hectares from satellite imagery, spread across 2 municipalities.
This entry is probably a heather, gorse or hill-grazing burn, not a wildfire. In the UK and Ireland moors and hillsides are burnt every winter and spring to renew grazing or heather. This is our assumption, based on the time of year, ground with almost no woodland and the lack of news about this fire; it is not confirmed. That is why it is left out of the wildfire rankings.
The power measured by the satellite is low (23.2 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
- Burnt area
- 1,089ha
- Copernicus perimeter
- Duration
- 2days
- 21 Mar 2022 – 22 Mar 2022
- Municipalities hit
- 2
- districts
- Started on
- 21 Mar
- 2022
- Heat detections
- 13
- in a single hotspot: 23 MW
- Danger at start
- 2
- Very low · FWI index
- Average daily power
- 60MW
- detected power per day, on average
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 4 days without rain (1 mm or more) when it started. Rain came after the fire: 3.7 mm on 30 Mar.
This area had burned before
54% of the perimeter overlaps earlier fires recorded since 2016: 148 ha in 2018, 188 ha in 2019, 314 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 589 ha that had burned before.
- 221 ha Powys fire, March 2020 229 ha in total; the hectares shown are those it shares with this fire
- 171 ha Powys fire, February 2019 186 ha in total; the hectares shown are those it shares with this fire
- 143 ha Powys fire, February 2018 144 ha in total; the hectares shown are those it shares with this fire
- 83 ha Powys fire, March 2020 113 ha in total; the hectares shown are those it shares with this fire
- 8 ha Powys fire, March 2020 111 ha in total; the hectares shown are those it shares with this fire
- 5 ha Powys fire, April 2018 142 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Powys where it started1,074 ha reached on 21 Mar0.2 %
-
1 ha0.0 %
Burnt area inside each municipality, from crossing the official perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
What burned
- Other natural land100 %
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
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) |
|---|---|---|---|---|---|
| 21 Mar | 13.3 °C | 48 % | 40 km/h | 0.0 mm | Very low 2 |
| 22 Mar | 15.2 °C | 56 % | 53 km/h | 0.0 mm | Very low 3 |
| 23 Mar after | 14.6 °C | 43 % | 38 km/h | 0.0 mm | Very low 3 |
| 24 Mar after | 16.0 °C | 39 % | 18 km/h | 0.0 mm | Very low 2 |
| 25 Mar after | 14.0 °C | 43 % | 36 km/h | 0.0 mm | Very low 4 |
| 26 Mar after | 14.4 °C | 46 % | 42 km/h | 0.0 mm | Very low 4 |
| 27 Mar after | 14.0 °C | 57 % | 36 km/h | 0.0 mm | Very low 4 |
| 28 Mar after | 15.0 °C | 54 % | 24 km/h | 0.0 mm | Very low 3 |
| 29 Mar after | 12.3 °C | 62 % | 32 km/h | 0.2 mm | Very low 3 |
| 30 Mar after | 10.0 °C | 73 % | 49 km/h | 3.7 mm | Very low 0 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
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 March 2022 the air beside the fire reached 39 µg/m³ of PM2.5. That day averaged 28: 1.9 times the WHO daily guideline (15).
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 · 13Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 547 haCarmarthenshire26 March 2020 · 4 days · 5 km away
- 562 haCarmarthenshire24 March 2020 · 4 days · 10 km away
- 1,470 haMerthyr Tydfil24 March 2022 · 2 days · 24 km away
- 1,200 haPowys11 April 2020 · 6 days · 24 km away
- 1,017 haMerthyr TydfilApril 2026 · 1 day · 24 km away
- 546 haMerthyr TydfilApril 2017 · 3 days · 24 km away
Frequently asked questions
- How long did the Powys fire last?
- Copernicus dates it between 21 March 2022 and 22 March 2022: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 1,089 hectares (10.9 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Powys (1,074 ha, 0.2 %); Carmarthenshire (1 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 16.0 °C, humidity dropped to 39 % and gusts hit 53 km/h. The fire danger index (FWI) reached 4, class Very low.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of United Kingdom (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: 999 · 112
Satellite cross-check
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
Where this data comes from
The perimeter and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. 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 Government Licence v3.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.