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AU · Australia · –

Roper Gulf fire, 24 August 2026 Roper Gulf

Out · last detection 13 Sept 2026, 05:33 UTC

The fire started on 24 August 2026 in Roper Gulf, Australia, and satellites saw it burning for 21 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 42,177 hectares from heat detections, spread across a single municipality.

This entry is probably a savanna fire in Australia’s tropical north, not a bushfire like those in the south of the country. Millions of hectares of northern savanna and grassland burn every year: much of it in burns lit on purpose early in the dry season (traditional fire management, parks and cattle stations), the rest in grass fires that return to the same ground every few years. This is our assumption, based on the location; it is not confirmed. That is why it is left out of the wildfire rankings.

GWIS near-real-time perimeter, from the layer that changed in October 2025: this fire is not compared with fires from earlier years, because since then the GWIS layer gives more and larger perimeters.

Burnt area
42,177ha
GWIS perimeter (Copernicus)
Duration
21days
24 Aug 2026 – 13 Sept 2026
Municipalities hit
1
local government areas
Started on
24 Aug
2026
Heat detections
833
in a single hotspot: 127 MW
Danger at start
46
Very high · FWI index
Average daily power
621MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 24 Aug13 Sept
13 Sept 2026

How it evolved, day by day

24 Aug 2026 · 239 MW · 24 26 Aug 2026 · 32 MW · 5 27 Aug 2026 · 738 MW · 67 28 Aug 2026 · 2,390 MW · 106 29 Aug 2026 · 500 MW · 61 30 Aug 2026 · 1,438 MW · 97 31 Aug 2026 · 129 MW · 28 1 Sept 2026 · 99 MW · 30 3 Sept 2026 · 3 MW · 4 4 Sept 2026 · 260 MW · 51 5 Sept 2026 · 1,377 MW · 64 6 Sept 2026 · 543 MW · 32 7 Sept 2026 · 1,659 MW · 137 8 Sept 2026 · 504 MW · 43 9 Sept 2026 · 520 MW · 35 10 Sept 2026 · 170 MW · 26 12 Sept 2026 · 82 MW · 4 13 Sept 2026 · 499 MW · 19
24 Aug 28 Aug 3 Sept 7 Sept 12 Sept

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

36°high
49km/h · peak gust
12%lowest humidity

It had gone 46 days without rain (1 mm or more) when it started.

This area had burned before

91% of the perimeter overlaps earlier fires recorded since 2016: 3,157 ha in 2016, 9,705 ha in 2017, 12,632 ha in 2018, 6,131 ha in 2019, 3,182 ha in 2020, 11,079 ha in 2021, 6,381 ha in 2022, 12,846 ha in 2023, 4,564 ha in 2024, 9,527 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 38,407 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 27% of the area of London (422 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Roper Gulf where it started
    42,655 ha reached on 24 Aug
    0.2 %

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 2025
Built-up area< 0.1 ha
Residents< 20

Inside 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)
24 Aug 32.8 °C 29 % 38 km/h 0.0 mm Very high 46
25 Aug 32.5 °C 30 % 28 km/h 0.0 mm Very high 40
26 Aug 33.0 °C 27 % 38 km/h 0.0 mm Very high 47
27 Aug 33.5 °C 20 % 28 km/h 0.0 mm Very high 43
28 Aug 33.0 °C 18 % 36 km/h 0.0 mm Very high 50
29 Aug 34.8 °C 21 % 42 km/h 0.0 mm Very high 50
30 Aug 32.8 °C 22 % 46 km/h 0.0 mm Extreme 56
31 Aug 31.1 °C 29 % 41 km/h 0.0 mm Very high 48
1 Sept 31.3 °C 29 % 44 km/h 0.0 mm Extreme 50
2 Sept 29.4 °C 44 % 42 km/h 0.0 mm Very high 38
3 Sept 32.2 °C 32 % 34 km/h 0.0 mm High 37
4 Sept 33.2 °C 30 % 32 km/h 0.0 mm High 38
5 Sept 34.5 °C 26 % 44 km/h 0.0 mm Very high 48
6 Sept 35.4 °C 25 % 44 km/h 0.0 mm Very high 49
7 Sept 35.9 °C 19 % 40 km/h 0.0 mm Extreme 54
8 Sept 36.5 °C 20 % 39 km/h 0.0 mm Extreme 50
9 Sept 34.0 °C 34 % 34 km/h 0.0 mm Very high 43
10 Sept 34.7 °C 27 % 36 km/h 0.0 mm Very high 45
11 Sept 30.4 °C 48 % 44 km/h 0.1 mm High 38
12 Sept 33.2 °C 29 % 41 km/h 0.0 mm Very high 44
13 Sept 34.8 °C 24 % 41 km/h 0.0 mm Very high 49
14 Sept after 33.8 °C 26 % 44 km/h 0.0 mm Extreme 50
15 Sept after 33.9 °C 25 % 44 km/h 0.0 mm Extreme 52
16 Sept after 35.3 °C 12 % 44 km/h 0.0 mm Extreme 63
17 Sept after 34.8 °C 18 % 44 km/h 0.0 mm Extreme 63
18 Sept after 31.9 °C 34 % 49 km/h 0.0 mm Extreme 52
19 Sept after 30.5 °C 41 % 46 km/h 0.0 mm Very high 43
20 Sept after 33.3 °C 24 % 44 km/h 0.0 mm Very high 48
21 Sept after 32.5 °C 26 % 36 km/h 0.0 mm Very high 46
22 Sept after 33.8 °C 22 % 38 km/h 0.0 mm Very high 48
23 Sept after 34.1 °C 23 % 41 km/h 0.0 mm Extreme 51
24 Sept after 33.8 °C 25 % 46 km/h 0.0 mm Extreme 54
25 Sept after 32.5 °C 31 % 40 km/h 0.0 mm Very high 48
26 Sept after 33.3 °C 28 % 48 km/h 0.0 mm Extreme 52
27 Sept after 33.7 °C 26 % 36 km/h 0.0 mm Very high 46
28 Sept after 35.0 °C 20 % 50 km/h 0.0 mm Extreme 54
29 Sept after 34.2 °C 25 % 41 km/h 0.0 mm Extreme 54
30 Sept after 32.2 °C 38 % 38 km/h 0.3 mm Very high 43

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 17 Aug 2026
After · 20 Sept 2026

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 · Copernicus

On 6 September 2026 the air beside the fire reached 73 µg/m³ of PM2.5. That day averaged 28: 1.9 times the WHO daily guideline (15).

PM2.5 peak73 µg/m³
Days over the guideline5 days
PM1075 µg/m³
Optical depth0.39
22 Aug28 Aug3 Sept9 Sept15 Sept
Good Fair Moderate Poor Very poor Extremely poor

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 · 833Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
Date and timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Australia

Frequently asked questions

How long did the Roper Gulf fire last?
GWIS (Copernicus) dates it between 24 August 2026 and 13 September 2026: 21 days between the first and last heat detection of the perimeter.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 42,177 hectares (421.8 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Roper Gulf (42,655 ha, 0.2 %).
What was the weather like?
During the fire the temperature reached 36.5 °C, humidity dropped to 12 % and gusts hit 49 km/h. The fire danger index (FWI) reached 63, 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.

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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 000.

How we know this
  • Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
  • Dates from the perimeter: the VIIRS detections inside it did not change them. 833 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.
  • Probably a vegetation burn: not counted in the totals.

How we build fire pages: methodology

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.