Ucayali fire, 29 August 2026 Coronel Portillo, Ucayali
The fire started on 29 August 2026 in Ucayali, Peru, and satellites saw it burning for 16 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,506 hectares from heat detections, spread across 2 municipalities.
It is the 14th largest in Loreto since 2016 (of 21 with a page). Number 39 in Peru in 2026, of 90.
The power measured by the satellite is low (14.5 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
- Burnt area
- 1,506ha
- GWIS perimeter (Copernicus)
- Duration
- 16days
- 29 Aug 2026 – 13 Sept 2026
- Municipalities hit
- 2
- provinces
- Started on
- 29 Aug
- 2026
- Heat detections
- 39
- in a single hotspot: 15 MW
- Danger at start
- 9
- Low · FWI index
- Average daily power
- 15MW
- 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 3 days without rain (1 mm or more) when it started. Rain came after the fire: 26.8 mm on 7 Sept.
This area had burned before
100% of the perimeter overlaps earlier fires recorded since 2016: 460 ha in 2019, 1,954 ha in 2022, 1,267 ha in 2023, 1,293 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 1,510 ha that had burned before.
- 1,293 ha Coronel Portillo fire, August 2024 14,316 ha in total; the hectares shown are those it shares with this fire
- 1,267 ha Ucayali fire, August 2023 3,351 ha in total; the hectares shown are those it shares with this fire
- 784 ha Ucayali fire, September 2022 1,349 ha in total; the hectares shown are those it shares with this fire
- 666 ha Ucayali fire, October 2022 1,372 ha in total; the hectares shown are those it shares with this fire
- 504 ha Coronel Portillo fire, September 2022 3,365 ha in total; the hectares shown are those it shares with this fire
- 460 ha Coronel Portillo fire, August 2019 1,155 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
-
Coronel Portillo 135,161 inhabitants784 ha reached on 31 Aug0.0 %
-
732 ha reached on 29 Aug0.0 %
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 was no noticeable built-up land and almost nobody lived there (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) |
|---|---|---|---|---|---|
| 29 Aug | 34.0 °C | 52 % | 26 km/h | 0.1 mm | Low 9 |
| 30 Aug | 34.2 °C | 51 % | 22 km/h | 0.0 mm | Low 9 |
| 31 Aug | 35.0 °C | 44 % | 27 km/h | 0.0 mm | Low 11 |
| 1 Sept | 35.8 °C | 42 % | 23 km/h | 0.0 mm | Moderate 12 |
| 2 Sept | 35.3 °C | 44 % | 14 km/h | 0.0 mm | Low 11 |
| 3 Sept | 31.9 °C | 63 % | 17 km/h | 7.6 mm | Very low 0 |
| 4 Sept | 34.0 °C | 51 % | 16 km/h | 0.5 mm | Very low 3 |
| 5 Sept | 34.0 °C | 51 % | 22 km/h | 0.7 mm | Low 6 |
| 6 Sept | 34.4 °C | 46 % | 24 km/h | 0.4 mm | Low 9 |
| 7 Sept | 25.8 °C | 72 % | 44 km/h | 26.8 mm | Very low 0 |
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 9 September 2026 the air beside the fire reached 66 µg/m³ of PM2.5. That day averaged 30: 2.0 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 · 39Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 3,365 haCoronel Portillo18 September 2022 · 18 days · 2 km away
- 3,351 haUcayaliAugust 2023 · 27 days · 2 km away
- 14,316 haCoronel Portillo31 August 2024 · 27 days · 4 km away
- 2,614 haUcayali27 August 2026 · 18 days · 7 km away
- 2,346 haUcayali7 September 2024 · 9 days · 11 km away
- 2,443 haCoronel Portillo11 September 2024 · 10 days · 12 km away
Frequently asked questions
- How long did the Ucayali fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 29 August 2026 to 13 September 2026 (16 days). The perimeter dates it from 29 August 2026 to 6 September 2026.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,506 hectares (15.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Coronel Portillo (784 ha, 0.0 %); Ucayali (732 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 35.8 °C, humidity dropped to 42 % and gusts hit 27 km/h. The fire danger index (FWI) reached 12, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Peru (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: 116 · 105 · Emergency number and official warnings ›
Satellite cross-check
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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 29 August 2026 to 6 September 2026. 39 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.