Loreto fire, 10 September 2025 Loreto
The fire started on 10 September 2025 in Loreto, Bolivia, and satellites saw it burning for 8 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 14,845 hectares from heat detections, spread across a single municipality.
It is the 85th largest in Beni since 2016 (of 902 with a page). Number 9 in Bolivia in 2025, of 94.
- Burnt area
- 14,845ha
- GWIS perimeter (Copernicus)
- Duration
- 8days
- 10 Sept 2025 – 17 Sept 2025
- Municipalities hit
- 1
- municipalities
- Started on
- 10 Sept
- 2025
- Heat detections
- 347
- in a single hotspot: 103 MW
- Danger at start
- 20
- Moderate · FWI index
- Energy released
- 4.2GW
- 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 4 days without rain (1 mm or more) when it started. Rain came after the fire: 8.7 mm on 22 Sept.
This area had burned before
95% of the perimeter overlaps earlier fires recorded since 2016: 4,410 ha in 2016, 2,455 ha in 2017, 5,861 ha in 2018, 4,834 ha in 2019, 3,413 ha in 2020, 8,153 ha in 2021, 1,571 ha in 2022, 9,392 ha in 2023, 2,281 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 14,030 ha that had burned before.
- 4,936 ha Loreto fire, October 2023 7,067 ha in total; the hectares shown are those it shares with this fire
- 3,278 ha Loreto fire, September 2018 5,476 ha in total; the hectares shown are those it shares with this fire
- 2,765 ha Loreto fire, October 2021 5,121 ha in total; the hectares shown are those it shares with this fire
- 2,634 ha Loreto fire, September 2016 3,262 ha in total; the hectares shown are those it shares with this fire
- 2,332 ha Loreto fire, October 2021 3,101 ha in total; the hectares shown are those it shares with this fire
- 2,080 ha Loreto fire, September 2024 5,655 ha in total; the hectares shown are those it shares with this fire
What happened to each town
-
14,933 ha2.2 %
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) |
|---|---|---|---|---|---|
| 10 Sept | 37.2 °C | 38 % | 27 km/h | 0.0 mm | Moderate 20 |
| 11 Sept | 37.9 °C | 39 % | 15 km/h | 0.1 mm | Moderate 20 |
| 12 Sept | 36.3 °C | 37 % | 31 km/h | 0.0 mm | High 22 |
| 13 Sept | 38.1 °C | 31 % | 29 km/h | 0.0 mm | High 25 |
| 14 Sept | 38.5 °C | 35 % | 39 km/h | 0.0 mm | High 28 |
| 15 Sept | 38.5 °C | 37 % | 36 km/h | 0.5 mm | High 28 |
| 16 Sept | 38.0 °C | 40 % | 25 km/h | 1.3 mm | Moderate 17 |
| 17 Sept | 31.2 °C | 61 % | 29 km/h | 9.9 mm | Very low 2 |
| 18 Sept after | 36.4 °C | 39 % | 25 km/h | 0.0 mm | Moderate 11 |
| 19 Sept after | 36.0 °C | 47 % | 41 km/h | 0.7 mm | Moderate 17 |
| 20 Sept after | 37.4 °C | 40 % | 51 km/h | 0.0 mm | High 23 |
| 21 Sept after | 37.1 °C | 39 % | 60 km/h | 0.0 mm | High 29 |
| 22 Sept after | 32.4 °C | 42 % | 46 km/h | 8.7 mm | Low 5 |
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 16 September 2025 the air beside the fire reached 146 µg/m³ of PM2.5. That day averaged 66: 4.4 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 · 347Every 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 Loreto fire last?
- GWIS (Copernicus) dates it between 10 September 2025 and 17 September 2025: 8 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 14,845 hectares (148.4 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Loreto (14,933 ha, 2.2 %).
- What was the weather like?
- During the fire the temperature reached 38.5 °C, humidity dropped to 31 % and gusts hit 51 km/h. The fire danger index (FWI) reached 28, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Bolivia (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: 119 · 110
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 ADM3 (Public Domain). 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.