How long did the Mount Isa fire last?

GWIS (Copernicus) dates it between 28 August 2026 and 8 September 2026: 12 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 14,553 hectares (145.5 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Mount Isa (14,692 ha, 0.3 %).

What was the weather like?

During the fire the temperature reached 35.8 °C, humidity dropped to 14 % and gusts hit 36 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.

AU · Australia · 2026-08-28 → 2026-09-08

Mount Isa fire, 28 August 2026 Mount Isa

Out · last detection 8 Sept 2026, 16:37 UTC

The fire started on 28 August 2026 in Mount Isa, Australia, and satellites saw it burning for 12 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 14,553 hectares from heat detections, spread across a single municipality.

It is the 478th largest in Queensland since 2016 (of 1737 with a page). Number 206 in Australia in 2026, of 876.

Compare with…

Suggestions: Mount Isa · 2022 Mount Isa · 2025 Mount Isa · 2024 Mount Isa · 2024

Burnt area: 14,553ha; GWIS perimeter (Copernicus)
Duration: 12days; 28 Aug 2026 – 8 Sept 2026
Municipalities hit: 1; local government areas
Started on: 28 Aug; 2026
Heat detections: 512; in a single hotspot: 118 MW
Danger at start: 43; Very high · FWI index
Average daily power: 342MW; detected power per day, on average

HOTSPOTS BY DAY 28 Aug8 Sept

Play back 8 Sept 2026

How it evolved, day by day

28 Aug 30 Aug 1 Sept 4 Sept 6 Sept 8 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

36km/h · peak gust

14%lowest humidity

It had gone 50 days without rain (1 mm or more) when it started.

This area had burned before

27% of the perimeter overlaps earlier fires recorded since 2016: 397 ha in 2022, 1,488 ha in 2023, 527 ha in 2024, 1,619 ha in 2025.

How big is it?

It burned the equivalent of 9.2% of the area of London (146 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

Mount Isa where it started

14,692 ha reached on 28 Aug

0.3 %

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.

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	Danger (FWI)
28 Aug	30.1 °C	21 %	35 km/h	Very high 43
29 Aug	29.2 °C	20 %	33 km/h	Very high 42
30 Aug	28.8 °C	24 %	34 km/h	Very high 43
31 Aug	28.3 °C	25 %	36 km/h	Very high 45
1 Sept	29.0 °C	29 %	35 km/h	Very high 43
2 Sept	31.0 °C	20 %	26 km/h	Very high 40
3 Sept	32.8 °C	17 %	22 km/h	Very high 41
4 Sept	33.3 °C	18 %	22 km/h	Very high 42
5 Sept	33.8 °C	20 %	14 km/h	High 36
6 Sept	35.3 °C	14 %	23 km/h	Very high 46
7 Sept	35.8 °C	14 %	31 km/h	Extreme 53
8 Sept	34.8 °C	15 %	35 km/h	Extreme 55
9 Sept after	34.6 °C	12 %	32 km/h	Extreme 54
10 Sept after	33.3 °C	20 %	43 km/h	Extreme 59
11 Sept after	31.9 °C	26 %	37 km/h	Extreme 50
12 Sept after	31.5 °C	28 %	34 km/h	Very high 46
13 Sept after	32.2 °C	20 %	30 km/h	Very high 44
14 Sept after	32.3 °C	21 %	34 km/h	Very high 46
15 Sept after	32.5 °C	16 %	45 km/h	Extreme 58
16 Sept after	33.3 °C	17 %	35 km/h	Extreme 52
17 Sept after	32.5 °C	16 %	44 km/h	Extreme 58
18 Sept after	31.2 °C	18 %	42 km/h	Extreme 56

Before and after, from space

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

↔

Before · 21 Aug 2026

After · 15 Sept 2026

Before After

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 25 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak25 µg/m³

Days over the guideline0 days

PM1026 µg/m³

Optical depth0.27

WHO 15

2627282930311234567891011

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 · 512Every 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 time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in Australia ›

Frequently asked questions

How long did the Mount Isa fire last?: GWIS (Copernicus) dates it between 28 August 2026 and 8 September 2026: 12 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 14,553 hectares (145.5 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Mount Isa (14,692 ha, 0.3 %).
What was the weather like?: During the fire the temperature reached 35.8 °C, humidity dropped to 14 % and gusts hit 36 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

NASA FIRMS ↗
GWIS · Copernicus ↗

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.

RSS Changes to this page

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.

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What really happened?

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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. 512 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.

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.

Where it burned