West Arnhem fire, 25 June 2026 West Arnhem
The fire started on 25 June 2026 in West Arnhem, Australia, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 14,760 hectares from heat detections, spread across a single municipality.
It is the 928th largest in Northern Territory since 2016 (of 3508 with a page). Number 207 in Australia in 2026, of 886.
Compare with…
- Burnt area
- 14,760ha
- GWIS perimeter (Copernicus)
- Duration
- 18days
- 25 Jun 2026 – 12 Jul 2026
- Municipalities hit
- 1
- local government areas
- Started on
- 25 Jun
- 2026
- Heat detections
- 343
- in a single hotspot: 110 MW
- Danger at start
- 27
- High · FWI index
- Average daily power
- 571MW
- 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 45 days without rain (1 mm or more) when it started.
This area had burned before
98% of the perimeter overlaps earlier fires recorded since 2016: 2,372 ha in 2016, 7,512 ha in 2017, 6,371 ha in 2018, 4,033 ha in 2019, 2,137 ha in 2020, 11,628 ha in 2021, 1,958 ha in 2022, 9,962 ha in 2023, 2,517 ha in 2024, 6,038 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 14,492 ha that had burned before.
- 9,687 ha West Arnhem fire, June 2023 22,729 ha in total; the hectares shown are those it shares with this fire
- 2,849 ha West Arnhem fire, May 2019 5,101 ha in total; the hectares shown are those it shares with this fire
- 2,244 ha West Arnhem fire, June 2018 5,899 ha in total; the hectares shown are those it shares with this fire
- 1,348 ha West Arnhem fire, May 2018 10,614 ha in total; the hectares shown are those it shares with this fire
- 88 ha West Arnhem fire, June 2022 7,054 ha in total; the hectares shown are those it shares with this fire
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
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).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
West Arnhem where it started14,854 ha reached on 26 Jun0.3 %
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) |
|---|---|---|---|---|---|
| 25 Jun | 29.8 °C | 42 % | 41 km/h | 0.0 mm | High 27 |
| 26 Jun | 30.2 °C | 42 % | 43 km/h | 0.0 mm | High 28 |
| 27 Jun | 29.9 °C | 40 % | 42 km/h | 0.0 mm | High 28 |
| 28 Jun | 29.9 °C | 44 % | 34 km/h | 0.0 mm | High 25 |
| 29 Jun | 30.5 °C | 50 % | 32 km/h | 0.0 mm | High 25 |
| 30 Jun | 31.0 °C | 42 % | 28 km/h | 0.0 mm | High 24 |
| 1 Jul | 30.4 °C | 51 % | 29 km/h | 0.0 mm | High 23 |
| 2 Jul | 30.5 °C | 48 % | 33 km/h | 0.0 mm | High 25 |
| 3 Jul | 30.4 °C | 45 % | 43 km/h | 0.0 mm | High 29 |
| 4 Jul | 30.3 °C | 40 % | 46 km/h | 0.0 mm | High 31 |
| 5 Jul | 30.6 °C | 37 % | 47 km/h | 0.0 mm | High 33 |
| 6 Jul | 29.6 °C | 41 % | 49 km/h | 0.0 mm | High 34 |
| 7 Jul | 29.9 °C | 40 % | 50 km/h | 0.0 mm | High 35 |
| 8 Jul | 30.1 °C | 44 % | 42 km/h | 0.2 mm | High 31 |
| 9 Jul | 31.0 °C | 37 % | 40 km/h | 0.0 mm | High 31 |
| 10 Jul | 30.8 °C | 34 % | 48 km/h | 0.0 mm | High 35 |
| 11 Jul | 30.5 °C | 26 % | 43 km/h | 0.0 mm | Very high 39 |
| 12 Jul | 30.2 °C | 33 % | 41 km/h | 0.0 mm | Very high 38 |
| 13 Jul after | 30.2 °C | 41 % | 36 km/h | 0.0 mm | High 32 |
| 14 Jul after | 29.8 °C | 38 % | 46 km/h | 0.0 mm | High 36 |
| 15 Jul after | 29.1 °C | 40 % | 50 km/h | 0.0 mm | Very high 40 |
| 16 Jul after | 29.8 °C | 35 % | 50 km/h | 0.0 mm | Very high 39 |
| 17 Jul after | 28.4 °C | 32 % | 51 km/h | 0.0 mm | Very high 40 |
| 18 Jul after | 28.1 °C | 29 % | 49 km/h | 0.0 mm | Very high 39 |
| 19 Jul after | 28.1 °C | 30 % | 46 km/h | 0.0 mm | High 37 |
| 20 Jul after | 28.4 °C | 31 % | 44 km/h | 0.0 mm | High 35 |
| 21 Jul after | 28.7 °C | 35 % | 40 km/h | 0.0 mm | High 34 |
| 22 Jul after | 28.8 °C | 30 % | 32 km/h | 0.0 mm | High 31 |
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 20 July 2026 the air beside the fire reached 62 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 · 343Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 22,729 haWest Arnhem9 June 2023 · 14 days · 8 km away
- 20,972 haWest Arnhem21 August 2019 · 28 days · 24 km away
- 15,950 haWest Arnhem16 August 2023 · 20 days · 31 km away
- 12,401 haWest Arnhem20 June 2026 · 32 days · 37 km away
- 77,105 haWest Arnhem29 July 2021 · 65 days · 39 km away
- 12,301 haWest Arnhem23 May 2020 · 20 days · 39 km away
Frequently asked questions
- How long did the West Arnhem fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 25 June 2026 to 12 July 2026 (18 days). The perimeter dates it from 1 July 2026 to 12 July 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 14,760 hectares (147.6 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered West Arnhem (14,854 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 31.0 °C, humidity dropped to 26 % and gusts hit 50 km/h. The fire danger index (FWI) reached 39, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Australia (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: 000 · Emergency number and official warnings ›
Satellite cross-check
History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Start date: 1 July 2026 → 25 June 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: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 1 July 2026 to 12 July 2026. 343 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 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 (Creative Commons Attribution 4.0 International (CC BY 4.0)). 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.