West Daly fire, 4 July 2018 West Daly
The fire started on 4 July 2018 in West Daly, Australia, and satellites saw it burning for 20 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 9,452 hectares from heat detections, spread across a single municipality.
It is the 1577th largest in Northern Territory since 2016 (of 3503 with a page). Number 425 in Australia in 2018, of 924.
The power measured by the satellite is low (23.5 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
- 9,452ha
- GWIS perimeter (Copernicus)
- Duration
- 20days
- 4 Jul 2018 – 23 Jul 2018
- Municipalities hit
- 1
- local government areas
- Started on
- 4 Jul
- 2018
- Heat detections
- 333
- in a single hotspot: 23 MW
- Danger at start
- 47
- Very high · FWI index
- Average daily power
- 65MW
- 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 more than two months without rain (1 mm or more) when it started.
This area had burned before
75% of the perimeter overlaps earlier fires recorded since 2016: 5,001 ha in 2016, 4,363 ha in 2017. Part of it burned more than once, so the yearly figures add up to more than the 7,093 ha that had burned before.
- 3,887 ha West Daly fire, June 2017 5,269 ha in total; the hectares shown are those it shares with this fire
- 319 ha West Daly fire, June 2016 81,588 ha in total; the hectares shown are those it shares with this fire
- 297 ha West Daly fire, May 2017 8,352 ha in total; the hectares shown are those it shares with this fire
- 87 ha West Daly fire, September 2017 17,725 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 started9,521 ha reached on 4 Jul0.7 %
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 2020Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, 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.
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) |
|---|---|---|---|---|---|
| 4 Jul | 33.3 °C | 24 % | 38 km/h | 0.0 mm | Very high 47 |
| 5 Jul | 33.4 °C | 22 % | 28 km/h | 0.0 mm | Very high 42 |
| 6 Jul | 34.1 °C | 25 % | 32 km/h | 0.0 mm | Very high 43 |
| 7 Jul | 32.6 °C | 23 % | 39 km/h | 0.0 mm | Very high 49 |
| 8 Jul | 28.9 °C | 17 % | 43 km/h | 0.0 mm | Extreme 52 |
| 9 Jul | 30.4 °C | 21 % | 40 km/h | 0.0 mm | Very high 49 |
| 10 Jul | 31.3 °C | 22 % | 41 km/h | 0.0 mm | Very high 49 |
| 11 Jul | 30.5 °C | 15 % | 38 km/h | 0.0 mm | Very high 48 |
| 12 Jul | 30.9 °C | 11 % | 34 km/h | 0.0 mm | Very high 48 |
| 13 Jul | 31.3 °C | 18 % | 34 km/h | 0.0 mm | Very high 48 |
| 14 Jul | 31.4 °C | 21 % | 32 km/h | 0.0 mm | Very high 46 |
| 15 Jul | 32.3 °C | 18 % | 26 km/h | 0.0 mm | Very high 44 |
| 16 Jul | 32.9 °C | 12 % | 38 km/h | 0.0 mm | Extreme 52 |
| 17 Jul | 33.3 °C | 13 % | 31 km/h | 0.0 mm | Very high 48 |
| 18 Jul | 34.4 °C | 10 % | 34 km/h | 0.0 mm | Extreme 52 |
| 19 Jul | 33.6 °C | 14 % | 38 km/h | 0.0 mm | Extreme 55 |
| 20 Jul | 34.6 °C | 10 % | 37 km/h | 0.0 mm | Extreme 54 |
| 21 Jul | 32.9 °C | 15 % | 40 km/h | 0.0 mm | Extreme 55 |
| 22 Jul | 32.3 °C | 10 % | 39 km/h | 0.0 mm | Extreme 55 |
| 23 Jul | 32.5 °C | 9 % | 36 km/h | 0.0 mm | Extreme 52 |
| 24 Jul after | 33.9 °C | 8 % | 30 km/h | 0.0 mm | Extreme 52 |
| 25 Jul after | 35.0 °C | 12 % | 20 km/h | 0.0 mm | Very high 48 |
| 26 Jul after | 33.1 °C | 24 % | 27 km/h | 0.0 mm | Very high 44 |
| 27 Jul after | 31.8 °C | 39 % | 28 km/h | 0.0 mm | High 34 |
| 28 Jul after | 32.0 °C | 39 % | 28 km/h | 0.0 mm | High 33 |
| 29 Jul after | 33.9 °C | 17 % | 24 km/h | 0.0 mm | Very high 41 |
| 30 Jul after | 35.3 °C | 24 % | 38 km/h | 0.0 mm | Very high 47 |
| 31 Jul after | 33.1 °C | 29 % | 27 km/h | 0.0 mm | Very high 39 |
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.
Detections table · 333Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 22,161 haWest Daly25 May 2019 · 15 days · 11 km away
- 128,854 haWest Daly10 July 2021 · 74 days · 15 km away
- 81,588 haWest Daly21 June 2016 · 21 days · 21 km away
- 35,586 haWest Daly6 May 2018 · 33 days · 22 km away
- 19,358 haWest Daly5 May 2026 · 11 days · 27 km away
- 17,795 haWest Daly9 June 2020 · 19 days · 32 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 4 July 2018 to 23 July 2018 (20 days). The perimeter dates it from 5 July 2018 to 19 July 2018.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 9,452 hectares (94.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered West Daly (9,521 ha, 0.7 %).
- What was the weather like?
- During the fire the temperature reached 34.6 °C, humidity dropped to 10 % and gusts hit 43 km/h. The fire danger index (FWI) reached 55, class Extreme.
- 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 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: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 5 July 2018 to 19 July 2018. 333 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 2020, 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.