How long did the Ribaué fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 21 August 2026 to 7 September 2026 (18 days). The perimeter dates it from 28 August 2026 to 2 September 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,367 hectares (33.7 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Ribaué (3,383 ha, 0.5 %).

What was the weather like?

During the fire the temperature reached 32.4 °C, humidity dropped to 20 % and gusts hit 50 km/h. The fire danger index (FWI) reached 36, class 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.

MZ · Mozambique · 2026-08-21 → 2026-09-07

Ribaué fire, 21 August 2026 Ribaué

Out · last detection 8 Sept 2026, 10:34 UTC

The fire started on 21 August 2026 in Ribaué, Mozambique, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,367 hectares from heat detections, spread across a single municipality.

It is the 305th largest in Nampula since 2016 (of 392 with a page). Number 430 in Mozambique in 2026, of 545.

Compare with…

Suggestions: Ribaué · 2017 Ribaué · 2025 Lalaua · 2026 Malema · 2025

Burnt area: 3,367ha; GWIS perimeter (Copernicus)
Duration: 18days; 21 Aug 2026 – 7 Sept 2026
Municipalities hit: 1; districts
Started on: 21 Aug; 2026
Heat detections: 98; in a single hotspot: 156 MW
Danger at start: 20; Moderate · FWI index
Average daily power: 75MW; detected power per day, on average

HOTSPOTS BY DAY 21 Aug7 Sept

Play back 8 Sept 2026

How it evolved, day by day

21 Aug 23 Aug 25 Aug 31 Aug 1 Sept 2 Sept 5 Sept 7 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

32°high

50km/h · peak gust

20%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started.

This area had burned before

92% of the perimeter overlaps earlier fires recorded since 2016: 80 ha in 2016, 1,470 ha in 2017, 746 ha in 2018, 861 ha in 2019, 37 ha in 2020, 1,394 ha in 2022, 333 ha in 2023, 1,113 ha in 2024, 841 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 3,089 ha that had burned before.

How big is it?

It burned the equivalent of 2.1% of the area of London (34 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

Ribaué where it started

3,383 ha reached on 21 Aug

0.5 %

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 area3.2 ha

Residents≈ 350

Inside the perimeter there were about 3.2 hectares of built-up land and about 350 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)
21 Aug	29.5 °C	45 %	40 km/h	0.7 mm	Moderate 20
22 Aug	31.7 °C	22 %	34 km/h	0.0 mm	High 32
23 Aug	32.4 °C	20 %	26 km/h	0.0 mm	High 33
24 Aug	28.6 °C	35 %	42 km/h	0.0 mm	High 34
25 Aug	30.0 °C	34 %	43 km/h	0.0 mm	High 34
26 Aug	28.2 °C	40 %	34 km/h	0.0 mm	High 29
27 Aug	27.8 °C	37 %	46 km/h	0.0 mm	High 32
28 Aug	26.5 °C	45 %	49 km/h	0.0 mm	High 30
29 Aug	26.7 °C	44 %	36 km/h	0.9 mm	Moderate 18
30 Aug	28.9 °C	36 %	50 km/h	0.0 mm	High 29
31 Aug	30.7 °C	28 %	40 km/h	0.0 mm	High 32
1 Sept	31.0 °C	25 %	35 km/h	0.0 mm	High 32
2 Sept	30.8 °C	26 %	39 km/h	0.0 mm	High 34
3 Sept	27.7 °C	34 %	40 km/h	0.0 mm	High 33
4 Sept	30.6 °C	30 %	35 km/h	0.0 mm	High 32
5 Sept	30.0 °C	36 %	32 km/h	0.0 mm	High 32
6 Sept	31.7 °C	30 %	29 km/h	0.0 mm	High 31
7 Sept	30.1 °C	31 %	41 km/h	0.0 mm	High 36
8 Sept after	24.3 °C	50 %	52 km/h	0.1 mm	High 30
9 Sept after	27.1 °C	43 %	44 km/h	0.0 mm	High 29
10 Sept after	28.2 °C	46 %	42 km/h	0.4 mm	High 25
11 Sept after	31.1 °C	31 %	32 km/h	0.0 mm	High 29
12 Sept after	31.4 °C	27 %	34 km/h	0.0 mm	High 34
13 Sept after	31.0 °C	27 %	33 km/h	0.0 mm	High 34
14 Sept after	30.6 °C	29 %	27 km/h	0.0 mm	High 32
15 Sept after	32.4 °C	25 %	41 km/h	0.0 mm	High 38
16 Sept after	28.4 °C	40 %	48 km/h	0.1 mm	High 35
17 Sept after	30.6 °C	37 %	37 km/h	0.2 mm	High 31

Before and after, from space

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

↔

Before · 14 Aug 2026

After · 14 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 3 September 2026 the air beside the fire reached 72 µg/m³ of PM2.5. That day averaged 28: 1.8 times the WHO daily guideline (15).

PM2.5 peak72 µg/m³

Days over the guideline7 days

PM1073 µg/m³

Optical depth0.77

WHO 15

1920212223242526272829303112345

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 · 98Every 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 Mozambique ›

Frequently asked questions

How long did the Ribaué fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 21 August 2026 to 7 September 2026 (18 days). The perimeter dates it from 28 August 2026 to 2 September 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,367 hectares (33.7 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Ribaué (3,383 ha, 0.5 %).
What was the weather like?: During the fire the temperature reached 32.4 °C, humidity dropped to 20 % and gusts hit 50 km/h. The fire danger index (FWI) reached 36, class 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

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 2 September 2026 → 7 September 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.

Report an error

What do you think is wrong?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

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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 28 August 2026 to 2 September 2026. 98 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 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.

Where it burned