Mlele fire, 4 August 2025 Mlele
The fire started on 4 August 2025 in Mlele, Tanzania, and satellites saw it burning for 3 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,594 hectares from heat detections, spread across a single municipality.
It is the 194th largest in Katavi since 2016 (of 271 with a page). Number 114 in Tanzania in 2025, of 161.
- Burnt area
- 3,594ha
- GWIS perimeter (Copernicus)
- Duration
- 3days
- 4 Aug 2025 – 6 Aug 2025
- Municipalities hit
- 1
- districts
- Started on
- 4 Aug
- 2025
- Heat detections
- 114
- in a single hotspot: 31 MW
- Danger at start
- 30
- High · FWI index
- Energy released
- 725MW
- sum of detected power
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 more than two months without rain (1 mm or more) when it started.
This area had burned before
93% of the perimeter overlaps earlier fires recorded since 2016: 2,912 ha in 2016, 378 ha in 2017, 1,521 ha in 2018, 2,416 ha in 2019, 158 ha in 2020, 730 ha in 2022, 1,526 ha in 2023, 26 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 3,343 ha that had burned before.
- 1,730 ha Mlele fire, July 2016 10,472 ha in total; the hectares shown are those it shares with this fire
- 1,521 ha Mlele fire, September 2018 3,363 ha in total; the hectares shown are those it shares with this fire
- 1,176 ha Mlele fire, August 2023 6,055 ha in total; the hectares shown are those it shares with this fire
- 378 ha Mlele fire, August 2017 10,537 ha in total; the hectares shown are those it shares with this fire
- 334 ha Mlele fire, August 2019 11,555 ha in total; the hectares shown are those it shares with this fire
- 252 ha Mlele fire, August 2016 8,486 ha in total; the hectares shown are those it shares with this fire
- 158 ha Mlele fire, September 2020 9,060 ha in total; the hectares shown are those it shares with this fire
- 26 ha Mlele fire, August 2024 3,095 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
Mlele where it started3,621 ha reached on 30 Jul0.1 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
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) |
|---|---|---|---|---|---|
| 4 Aug | 25.5 °C | 35 % | 36 km/h | 0.0 mm | High 30 |
| 5 Aug | 26.1 °C | 34 % | 35 km/h | 0.0 mm | High 30 |
| 6 Aug | 27.6 °C | 35 % | 28 km/h | 0.0 mm | High 27 |
| 7 Aug after | 27.7 °C | 39 % | 28 km/h | 0.0 mm | High 27 |
| 8 Aug after | 28.6 °C | 39 % | 33 km/h | 0.0 mm | High 30 |
| 9 Aug after | 27.0 °C | 44 % | 37 km/h | 0.0 mm | High 30 |
| 10 Aug after | 27.2 °C | 43 % | 33 km/h | 0.0 mm | High 29 |
| 11 Aug after | 27.9 °C | 37 % | 38 km/h | 0.0 mm | High 31 |
| 12 Aug after | 26.7 °C | 38 % | 38 km/h | 0.0 mm | High 31 |
| 13 Aug after | 26.3 °C | 42 % | 33 km/h | 0.0 mm | High 30 |
| 14 Aug after | 27.6 °C | 40 % | 32 km/h | 0.0 mm | High 29 |
| 15 Aug after | 27.8 °C | 41 % | 33 km/h | 0.0 mm | High 30 |
| 16 Aug after | 27.4 °C | 40 % | 30 km/h | 0.0 mm | High 29 |
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 5 August 2025 the air beside the fire reached 60 µg/m³ of PM2.5. That day averaged 34: 2.3 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 · 114Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Mlele fire last?
- GWIS (Copernicus) dates it between 4 August 2025 and 6 August 2025: 3 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 3,594 hectares (35.9 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Mlele (3,621 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 27.6 °C, humidity dropped to 34 % and gusts hit 36 km/h. The fire danger index (FWI) reached 30, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Tanzania (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: 112
Satellite cross-check
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
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.