Ribaué fire, 11 September 2025 Ribaué, Alto Molocue, Gilé
The fire started on 11 September 2025 in Ribaué, Mozambique, and satellites saw it burning for 19 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,540 hectares from heat detections, spread across 3 municipalities.
It is the 270th largest in Nampula since 2016 (of 392 with a page). Number 230 in Mozambique in 2025, of 313.
Compare with…
- Burnt area
- 3,540ha
- GWIS perimeter (Copernicus)
- Duration
- 19days
- 11 Sept 2025 – 29 Sept 2025
- Municipalities hit
- 3
- districts
- Started on
- 11 Sept
- 2025
- Heat detections
- 126
- in a single hotspot: 63 MW
- Danger at start
- 36
- High · FWI index
- Average daily power
- 79MW
- 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 45 days without rain (1 mm or more) when it started. Rain came after the fire: 1.9 mm on 1 Oct.
This area had burned before
100% of the perimeter overlaps earlier fires recorded since 2016: 1,970 ha in 2016, 2,224 ha in 2017, 1,053 ha in 2018, 787 ha in 2019, 500 ha in 2020, 887 ha in 2021, 1,898 ha in 2022, 2,249 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 3,551 ha that had burned before.
- 2,249 ha Alto Molocue fire, September 2024 8,367 ha in total; the hectares shown are those it shares with this fire
- 1,873 ha Gilé fire, September 2022 90,638 ha in total; the hectares shown are those it shares with this fire
- 1,236 ha Ribaué fire, September 2016 5,240 ha in total; the hectares shown are those it shares with this fire
- 672 ha Gilé fire, September 2018 6,451 ha in total; the hectares shown are those it shares with this fire
- 601 ha Ribaué fire, September 2019 12,655 ha in total; the hectares shown are those it shares with this fire
- 381 ha Ribaué fire, September 2018 9,164 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
-
Ribaué where it started1,980 ha reached on 11 Sept0.3 %
-
1,087 ha reached on 14 Sept0.2 %
-
491 ha reached on 11 Sept0.0 %
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 were about 1.9 hectares of built-up land and about 250 residents (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) |
|---|---|---|---|---|---|
| 18 Sept | 33.8 °C | 25 % | 30 km/h | 0.0 mm | High 36 |
| 19 Sept | 31.2 °C | 36 % | 32 km/h | 0.0 mm | High 35 |
| 20 Sept | 30.2 °C | 32 % | 41 km/h | 0.4 mm | High 36 |
| 21 Sept | 30.7 °C | 31 % | 40 km/h | 0.0 mm | High 38 |
| 22 Sept | 33.5 °C | 25 % | 24 km/h | 0.0 mm | High 35 |
| 23 Sept | 33.5 °C | 26 % | 34 km/h | 0.0 mm | High 36 |
| 24 Sept | 31.4 °C | 31 % | 32 km/h | 0.0 mm | High 37 |
| 25 Sept | 32.6 °C | 26 % | 38 km/h | 0.0 mm | Very high 42 |
| 26 Sept | 29.5 °C | 36 % | 40 km/h | 0.0 mm | High 38 |
| 27 Sept | 26.6 °C | 50 % | 38 km/h | 0.7 mm | High 23 |
| 28 Sept | 30.6 °C | 36 % | 30 km/h | 0.0 mm | High 26 |
| 29 Sept | 32.8 °C | 32 % | 41 km/h | 0.0 mm | High 35 |
| 30 Sept after | 31.0 °C | 36 % | 35 km/h | 0.0 mm | High 35 |
| 1 Oct after | 26.5 °C | 56 % | 50 km/h | 1.9 mm | Moderate 14 |
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 24 September 2025 the air beside the fire reached 65 µg/m³ of PM2.5. That day averaged 25: 1.7 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 · 126Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 145,344 haRibaué16 August 2026 · 43 days · 4 km away
- 25,284 haGilé5 September 2018 · 26 days · 21 km away
- 169,464 haGilé1 September 2025 · 29 days · 22 km away
- 70,839 haGilé6 September 2024 · 23 days · 27 km away
- 53,154 haRibaué6 September 2017 · 22 days · 30 km away
- 90,638 haGilé20 September 2022 · 32 days · 33 km away
Frequently asked questions
- How long did the Ribaué fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 11 September 2025 to 29 September 2025 (19 days). The perimeter dates it from 18 September 2025 to 28 September 2025.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,540 hectares (35.4 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Ribaué (1,980 ha, 0.3 %); Alto Molocue (1,087 ha, 0.2 %); Gilé (491 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 33.8 °C, humidity dropped to 25 % and gusts hit 41 km/h. The fire danger index (FWI) reached 42, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mozambique (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.
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: 28 September 2025 → 29 September 2025.
- Start date: 18 September 2025 → 11 September 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 18 September 2025 to 28 September 2025. 126 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 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). 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.