West Daly fire, 8 May 2025 West Daly
The fire started on 8 May 2025 in West Daly, Australia, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,391 hectares from heat detections, spread across a single municipality.
It is the 3179th largest in Northern Territory since 2016 (of 3517 with a page). Number 1025 in Australia in 2025, of 1124.
Compare with…
- Burnt area
- 5,391ha
- GWIS perimeter (Copernicus)
- Duration
- 11days
- 8 May 2025 – 18 May 2025
- Municipalities hit
- 1
- local government areas
- Started on
- 8 May
- 2025
- Heat detections
- 163
- in a single hotspot: 209 MW
- Danger at start
- 21
- High · FWI index
- Average daily power
- 324MW
- 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 17 days without rain (1 mm or more) when it started. Rain came after the fire: 3.8 mm on 27 May.
This area had burned before
100% of the perimeter overlaps earlier fires recorded since 2016: 2,822 ha in 2016, 4,559 ha in 2017, 4,505 ha in 2018, 1,986 ha in 2019, 4,136 ha in 2020, 3,062 ha in 2021, 4,090 ha in 2022, 3,422 ha in 2023, 1,111 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 5,423 ha that had burned before.
- 2,636 ha West Daly fire, July 2020 5,423 ha in total; the hectares shown are those it shares with this fire
- 2,553 ha West Daly fire, September 2023 6,619 ha in total; the hectares shown are those it shares with this fire
- 2,432 ha West Daly fire, August 2018 16,126 ha in total; the hectares shown are those it shares with this fire
- 596 ha West Daly fire, June 2022 5,667 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 Daly where it started5,414 ha reached on 8 May0.4 %
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 2025Inside the perimeter there was no noticeable built-up land and almost nobody lived there (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) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 8 May | 32.0 °C | 35 % | 41 km/h | 0.0 mm | High 21 |
| 9 May | 33.2 °C | 38 % | 40 km/h | 0.0 mm | Moderate 21 |
| 10 May | 32.5 °C | 33 % | 47 km/h | 0.0 mm | High 24 |
| 11 May | 32.6 °C | 37 % | 35 km/h | 0.0 mm | Moderate 21 |
| 12 May | 32.8 °C | 47 % | 35 km/h | 0.0 mm | Moderate 21 |
| 13 May | 33.9 °C | 39 % | 35 km/h | 0.0 mm | Moderate 20 |
| 14 May | 34.0 °C | 39 % | 42 km/h | 0.0 mm | High 23 |
| 15 May | 32.7 °C | 30 % | 45 km/h | 0.0 mm | High 27 |
| 16 May | 31.4 °C | 27 % | 44 km/h | 0.0 mm | High 29 |
| 17 May | 30.3 °C | 30 % | 45 km/h | 0.0 mm | High 29 |
| 18 May | 28.4 °C | 25 % | 48 km/h | 0.0 mm | High 32 |
| 19 May after | 28.6 °C | 29 % | 47 km/h | 0.0 mm | High 31 |
| 20 May after | 30.6 °C | 37 % | 40 km/h | 0.0 mm | High 28 |
| 21 May after | 30.5 °C | 31 % | 45 km/h | 0.0 mm | High 31 |
| 22 May after | 31.0 °C | 26 % | 41 km/h | 0.0 mm | High 30 |
| 23 May after | 32.0 °C | 29 % | 37 km/h | 0.0 mm | High 30 |
| 24 May after | 33.9 °C | 37 % | 29 km/h | 0.0 mm | High 26 |
| 25 May after | 34.1 °C | 48 % | 34 km/h | 0.0 mm | High 25 |
| 26 May after | 33.5 °C | 53 % | 32 km/h | 0.4 mm | Moderate 20 |
| 27 May after | 31.1 °C | 61 % | 24 km/h | 3.8 mm | Very low 4 |
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 17 May 2025 the air beside the fire reached 52 µg/m³ of PM2.5. That day averaged 18: 1.2 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 · 163Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 16,126 haWest Daly9 August 2018 · 10 days · 7 km away
- 25,872 haWest Daly5 June 2017 · 16 days · 17 km away
- 17,414 haWest Daly13 May 2025 · 10 days · 17 km away
- 15,521 haWest Daly19 July 2021 · 24 days · 18 km away
- 25,324 haWest Daly23 June 2026 · 29 days · 28 km away
- 22,476 haWest Daly15 August 2022 · 13 days · 28 km away
Frequently asked questions
- How long did the West Daly fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 8 May 2025 to 18 May 2025 (11 days). The perimeter dates it from 8 May 2025 to 14 May 2025.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 5,391 hectares (53.9 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered West Daly (5,414 ha, 0.4 %).
- What was the weather like?
- During the fire the temperature reached 34.0 °C, humidity dropped to 25 % and gusts hit 48 km/h. The fire danger index (FWI) reached 32, class 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.
- Last day with fire: 14 May 2025 → 18 May 2025.
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 8 May 2025 to 14 May 2025. 163 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.
- 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 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.