Burned area
satellite only20,713ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 7 Sept 2021 – 29 Sept 2021
+− cross-check
No official record is matched to this page to compare it with.
AU · Australia · –
Roper Gulf fire, 7 September 2021 Roper Gulf
Out · last detection 29 Sept 2021, 04:20 UTC
The fire started on 7 September 2021 in Roper Gulf, Australia, and satellites saw it burning for 23 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 20,713 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.
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Fire page data · version 2026-10-26matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only23days
7 Sept 2021 to 29 Sept 2021: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 29 Sept 2021, 04:20 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only7 Sept 2021
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 7 Sept 2021
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only991
VIIRS detections at 375 m. Most intense hotspot: 113 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 7 Sept 2021 – 29 Sept 2021
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only2,782MW
Total radiative power on 21 September 2021; hotspots that day: 457.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 21 Sept 2021
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model67.7FWI · extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 60.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 7 Sept 2021, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model37.7°C · 12% RH
High of 37.7 °C and minimum humidity of 12% on 15 September 2021; gusts of 63 km/h on 21 September 2021.
- Source
- weather model at the fire’s grid cell
- Date
- 7 Sept 2021 – 29 Sept 2021
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
logLast day with fire: 26 September 2021 → 29 September 2021.
-
logStart date: 14 September 2021 → 7 September 2021.
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 26 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 20,713 ha
- Dates
- 7 Sept 2021 – 29 Sept 2021
- Name
- Roper Gulf
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/roper-gulf-2021-09-4?v=2026-10-26A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire roper-gulf-2021-09-4.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-09-07 | 5 | 25 | 31.1 | 21.5 | 18 | 24.7 | 52.6 | 0 | 67.7 | extremo | 1 |
| 2021-09-08 | 35 | 362 | 31.1 | 19 | 13 | 27.7 | 60.5 | 0 | 78.9 | muy_extremo | 1 |
| 2021-09-09 | 13 | 98 | 30.1 | 18 | 19 | 25.6 | 55.8 | 0 | 68.7 | extremo | 1 |
| 2021-09-10 | 0 | 0 | 31.5 | 17.5 | 34 | 19.6 | 44.3 | 0 | 56.5 | extremo | 1 |
| 2021-09-11 | 5 | 39 | 33.5 | 17.1 | 25 | 17.3 | 37.1 | 0 | 48.7 | muy_alto | 1 |
| 2021-09-12 | 0 | 0 | 33.1 | 20.7 | 41 | 15 | 36.4 | 0.7 | 45.6 | muy_alto | 1 |
| 2021-09-13 | 0 | 0 | 34.5 | 21.1 | 38 | 14.6 | 32.8 | 0 | 39.7 | muy_alto | 1 |
| 2021-09-14 | 7 | 30 | 36.5 | 20 | 18 | 17.7 | 40 | 0 | 67.2 | extremo | 1 |
| 2021-09-15 | 35 | 277 | 37.7 | 19.8 | 12 | 22.4 | 48.2 | 0 | 78.2 | muy_extremo | 1 |
| 2021-09-16 | 19 | 76 | 36 | 15.6 | 16 | 20.7 | 45.7 | 0 | 70.4 | muy_extremo | 1 |
| 2021-09-17 | 18 | 187 | 33.3 | 16.7 | 33 | 16.4 | 37.8 | 0 | 56.4 | extremo | 1 |
| 2021-09-18 | 8 | 60 | 32 | 17.2 | 38 | 17.9 | 41.8 | 0 | 48.3 | muy_alto | 1 |
| 2021-09-19 | 12 | 100 | 33 | 16.6 | 36 | 16.2 | 38.2 | 0 | 43.6 | muy_alto | 1 |
| 2021-09-20 | 2 | 7 | 36.2 | 15.6 | 22 | 15.9 | 35.6 | 0 | 59 | extremo | 1 |
| 2021-09-21 | 457 | 2,782 | 35 | 19.5 | 8 | 30.7 | 63 | 0 | 106.5 | muy_extremo | 1 |
| 2021-09-22 | 200 | 1,214 | 29.1 | 16.8 | 8 | 26.9 | 55.1 | 0 | 76.3 | muy_extremo | 1 |
| 2021-09-23 | 116 | 1,287 | 31 | 13.4 | 11 | 19.4 | 42.5 | 0 | 73.7 | muy_extremo | 1 |
| 2021-09-24 | 39 | 711 | 32.2 | 14.4 | 17 | 17.9 | 41 | 0 | 76.6 | muy_extremo | 1 |
| 2021-09-25 | 9 | 77 | 33.3 | 16.2 | 28 | 18.2 | 39.2 | 0 | 57.4 | extremo | 1 |
| 2021-09-26 | 4 | 38 | 35.5 | 16.5 | 22 | 16.7 | 37.4 | 0 | 51.9 | extremo | 1 |
| 2021-09-27 | 1 | 10 | 36.3 | 17.4 | 24 | 21.5 | 47.5 | 0 | 49.1 | muy_alto | 1 |
| 2021-09-28 | 3 | 14 | 33.8 | 20.4 | 38 | 18.8 | 41.8 | 0 | 56.1 | extremo | 1 |
| 2021-09-29 | 3 | 37 | 32.8 | 21.6 | 43 | 17 | 41.4 | 0 | 49.9 | muy_alto | 1 |
| 2021-09-30 | 0 | 0 | 32.8 | 21.9 | 42 | 16 | 39.2 | 0 | 47.4 | muy_alto | 0 |
| 2021-10-01 | 0 | 0 | 34.4 | 22.5 | 38 | 14.8 | 32.4 | 0 | 39.6 | muy_alto | 0 |
| 2021-10-02 | 0 | 0 | 35.9 | 22.8 | 33 | 18.7 | 40.7 | 0 | 49.7 | muy_alto | 0 |
| 2021-10-03 | 0 | 0 | 36.3 | 23.4 | 36 | 14.9 | 33.1 | 0 | 43.5 | muy_alto | 0 |
| 2021-10-04 | 0 | 0 | 37.8 | 23.1 | 30 | 19.8 | 40 | 0 | 37.5 | alto | 0 |
| 2021-10-05 | 0 | 0 | 36.7 | 24.7 | 34 | 14.3 | 30.2 | 0 | 39.3 | muy_alto | 0 |
| 2021-10-06 | 0 | 0 | 38.8 | 19.2 | 13 | 20.9 | 45.7 | 0 | 86 | muy_extremo | 0 |
| 2021-10-07 | 0 | 0 | 36 | 21 | 28 | 17.9 | 41.8 | 0 | 65.5 | extremo | 0 |
| 2021-10-08 | 0 | 0 | 35.1 | 22.6 | 36 | 16 | 36 | 0 | 51.9 | extremo | 0 |
| 2021-10-09 | 0 | 0 | 35 | 21.2 | 38 | 17.6 | 40.7 | 0 | 56.6 | extremo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 20,713ha
- GWIS perimeter (Copernicus)
- Duration
- 23days
- 7 Sept 2021 – 29 Sept 2021
- Municipalities hit
- 1
- local government areas
- Started on
- 7 Sept
- 2021
- Heat detections
- 991
- in a single hotspot: 113 MW
- Danger at start
- 68
- Extreme · FWI index
- Average daily power
- 372MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
7 Sept29 Sept
29 Sept 2021
How it evolved, day by day
7 Sept
14 Sept
18 Sept
21 Sept
26 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
38°high
63km/h · peak gust
8%lowest humidity
It had gone more than two months without rain (1 mm or more) when it started.
This area had burned before
96% of the perimeter overlaps earlier fires recorded since 2016: 2,400 ha in 2016, 1,116 ha in 2017, 6,083 ha in 2018, 18,679 ha in 2019, 5,165 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 19,902 ha that had burned before.
- 1,948 ha Roper Gulf fire, December 2016 10,877 ha in total; the hectares shown are those it shares with this fire
- 1,024 ha Roper Gulf fire, December 2019 18,192 ha in total; the hectares shown are those it shares with this fire
- 396 ha Roper Gulf fire, June 2019 5,738 ha in total; the hectares shown are those it shares with this fire
- 107 ha Roper Gulf fire, May 2019 16,610 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
-
Roper Gulf where it started20,933 ha reached on 7 Sept0.1 %
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 2020Built-up area< 0.1 ha
Residents< 20
Inside 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)
Started with Extreme FWI: 43 % of the area in Australia Strong wind: 39 % of the area in Australia 60 days without rain: 8.2 % of the area in Australia
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 7 Sept | 31.1 °C | 18 % | 53 km/h | 0.0 mm | Extreme 68 |
| 8 Sept | 31.1 °C | 13 % | 60 km/h | 0.0 mm | Very extreme 79 |
| 9 Sept | 30.1 °C | 19 % | 56 km/h | 0.0 mm | Extreme 69 |
| 10 Sept | 31.5 °C | 34 % | 44 km/h | 0.0 mm | Extreme 56 |
| 11 Sept | 33.5 °C | 25 % | 37 km/h | 0.0 mm | Very high 49 |
| 12 Sept | 33.1 °C | 41 % | 36 km/h | 0.7 mm | Very high 46 |
| 13 Sept | 34.5 °C | 38 % | 33 km/h | 0.0 mm | Very high 40 |
| 14 Sept | 36.5 °C | 18 % | 40 km/h | 0.0 mm | Extreme 67 |
| 15 Sept | 37.7 °C | 12 % | 48 km/h | 0.0 mm | Very extreme 78 |
| 16 Sept | 36.0 °C | 16 % | 46 km/h | 0.0 mm | Very extreme 70 |
| 17 Sept | 33.3 °C | 33 % | 38 km/h | 0.0 mm | Extreme 56 |
| 18 Sept | 32.0 °C | 38 % | 42 km/h | 0.0 mm | Very high 48 |
| 19 Sept | 33.0 °C | 36 % | 38 km/h | 0.0 mm | Very high 44 |
| 20 Sept | 36.2 °C | 22 % | 36 km/h | 0.0 mm | Extreme 59 |
| 21 Sept | 35.0 °C | 8 % | 63 km/h | 0.0 mm | Very extreme 106 |
| 22 Sept | 29.1 °C | 8 % | 55 km/h | 0.0 mm | Very extreme 76 |
| 23 Sept | 31.0 °C | 11 % | 42 km/h | 0.0 mm | Very extreme 74 |
| 24 Sept | 32.2 °C | 17 % | 41 km/h | 0.0 mm | Very extreme 77 |
| 25 Sept | 33.3 °C | 28 % | 39 km/h | 0.0 mm | Extreme 57 |
| 26 Sept | 35.5 °C | 22 % | 37 km/h | 0.0 mm | Extreme 52 |
| 27 Sept | 36.3 °C | 24 % | 48 km/h | 0.0 mm | Very high 49 |
| 28 Sept | 33.8 °C | 38 % | 42 km/h | 0.0 mm | Extreme 56 |
| 29 Sept | 32.8 °C | 43 % | 41 km/h | 0.0 mm | Very high 50 |
| 30 Sept after | 32.8 °C | 42 % | 39 km/h | 0.0 mm | Very high 47 |
| 1 Oct after | 34.4 °C | 38 % | 32 km/h | 0.0 mm | Very high 40 |
| 2 Oct after | 35.9 °C | 33 % | 41 km/h | 0.0 mm | Very high 50 |
| 3 Oct after | 36.3 °C | 36 % | 33 km/h | 0.0 mm | Very high 44 |
| 4 Oct after | 37.8 °C | 30 % | 40 km/h | 0.0 mm | High 38 |
| 5 Oct after | 36.7 °C | 34 % | 30 km/h | 0.0 mm | Very high 39 |
| 6 Oct after | 38.8 °C | 13 % | 46 km/h | 0.0 mm | Very extreme 86 |
| 7 Oct after | 36.0 °C | 28 % | 42 km/h | 0.0 mm | Extreme 66 |
| 8 Oct after | 35.1 °C | 36 % | 36 km/h | 0.0 mm | Extreme 52 |
| 9 Oct after | 35.0 °C | 38 % | 41 km/h | 0.0 mm | Extreme 57 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 31 Aug 2021
After · 6 Oct 2021
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 · 991Every 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
- 20,670 haRoper Gulf1 August 2019 · 16 days · 4 km away
- 47,257 haRoper Gulf7 August 2019 · 30 days · 16 km away
- 21,726 haRoper Gulf19 July 2026 · 18 days · 22 km away
- 30,367 haRoper Gulf29 October 2025 · 18 days · 31 km away
- 77,341 haRoper Gulf25 October 2020 · 40 days · 32 km away
- 24,701 haRoper Gulf20 May 2023 · 21 days · 37 km away
Frequently asked questions
- How long did the Roper Gulf fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 7 September 2021 to 29 September 2021 (23 days). The perimeter dates it from 14 September 2021 to 26 September 2021.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 20,713 hectares (207.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Roper Gulf (20,933 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 37.7 °C, humidity dropped to 8 % and gusts hit 63 km/h. The fire danger index (FWI) reached 106, class Very 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 26 September 2021 → 29 September 2021.
- Start date: 14 September 2021 → 7 September 2021.
RSS Changes to this page With cross-checks and a citable version
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 14 September 2021 to 26 September 2021. 991 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.
- Probably a vegetation burn: not counted in the totals.
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.