Torfaen fire, July 2026 Torfaen, Monmouthshire
The fire started on 20 July 2026 in Torfaen, United Kingdom, and satellites saw it burning for 9 days. Copernicus mapped a burnt perimeter of 173 hectares from satellite imagery, spread across 2 municipalities.
It is the 15th largest in Wales since 2016 (of 25 with a page). Number 16 in United Kingdom in 2026, of 21.
The power measured by the satellite is low (22.7 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
- Burnt area
- 173ha
- Copernicus perimeter
- Duration
- ≈ 9days
- 20 Jul 2026 – 28 Jul 2026
- Municipalities hit
- 2
- districts
- Started on
- 20 Jul
- 2026
- Heat detections
- 103
- in a single hotspot: 23 MW
- Danger at start
- 25
- High · FWI index
- Average daily power
- 62MW
- 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 12 days without rain (1 mm or more) when it started.
This area had burned before
6% of the perimeter overlaps earlier fires recorded since 2016: 11 ha in 2023.
What happened to each town
-
Torfaen where it started152 ha reached on 20 Jul1.2 %
-
5 ha reached on 21 Jul0.0 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Other natural land95 %
- Coniferous forest4.7 %
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) |
|---|---|---|---|---|---|
| 20 Jul | 26.0 °C | 23 % | 23 km/h | 0.0 mm | High 25 |
| 21 Jul | 27.4 °C | 32 % | 18 km/h | 0.0 mm | High 23 |
| 22 Jul | 25.9 °C | 37 % | 14 km/h | 0.0 mm | Moderate 20 |
| 23 Jul | 26.0 °C | 37 % | 20 km/h | 0.0 mm | High 23 |
| 24 Jul | 26.5 °C | 31 % | 21 km/h | 0.0 mm | High 24 |
| 25 Jul | 25.9 °C | 25 % | 30 km/h | 0.0 mm | High 33 |
| 26 Jul | 22.0 °C | 40 % | 30 km/h | 0.3 mm | High 30 |
| 27 Jul | 25.5 °C | 41 % | 36 km/h | 0.0 mm | High 27 |
| 28 Jul | 24.5 °C | 59 % | 34 km/h | 0.0 mm | Moderate 17 |
| 29 Jul after | 24.9 °C | 52 % | 38 km/h | 0.0 mm | Moderate 19 |
| 30 Jul after | 23.0 °C | 42 % | 30 km/h | 0.0 mm | Moderate 18 |
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 23 July 2026 the air beside the fire reached 85 µg/m³ of PM2.5. That day averaged 42: 2.8 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 · 103Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 788 haPowys23 March 2022 · 4 days · 13 km away
- 701 haPowys8 August 2026 · 10 days · 14 km away
- 1,470 haMerthyr Tydfil24 March 2022 · 2 days · 26 km away
- 1,200 haPowys11 April 2020 · 6 days · 26 km away
- 1,017 haMerthyr TydfilApril 2026 · 8 days · 26 km away
- 546 haMerthyr TydfilApril 2017 · 3 days · 26 km away
Frequently asked questions
- How long did the Torfaen fire last?
- The official perimeter only gives the start date (20 July 2026). The end comes from the heat detections inside the perimeter: it burned until 28 July 2026 (9 days from 20 July 2026), the last day with detections before more than 10 days in a row without any, so it is approximate.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 173 hectares (1.7 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Torfaen (152 ha, 1.2 %); Monmouthshire (5 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 26.0 °C, humidity dropped to 23 % and gusts hit 23 km/h. The fire danger index (FWI) reached 25, class High.
- 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 · 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.
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: EFFIS (Copernicus), mapped on satellite imagery.
- The official perimeter has no end date: the end is the last day with VIIRS detections inside the perimeter before a gap of more than 10 days (150 days at most), so it is approximate. 103 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.
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.