Monção fire, October 2023 Penso, Messegães, Valadares e Sá, Riba de Mouro
The fire started on 13 October 2023 in Penso, Portugal, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 169 hectares from satellite imagery, spread across 4 municipalities.
Number 28 in Portugal in 2023, of 38.
The power measured by the satellite is low (1.0 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
- 169ha
- Copernicus perimeter
- Duration
- 1day
- 13 Oct 2023 – 13 Oct 2023
- Municipalities hit
- 4
- freguesias
- Started on
- 13 Oct
- 2023
- Heat detections
- 8
- in a single hotspot: 1 MW
- Danger at start
- 1
- Very low · FWI index
- Average daily power
- 5MW
- detected power per day, on average
Where it burned
How it evolved, day by day
13 Oct 2023 · 5 MW · 8
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 21 days without rain (1 mm or more) when it started. Rain came after the fire: 1.6 mm on 14 Oct.
This area had burned before
12% of the perimeter overlaps earlier fires recorded since 2016: 20 ha in 2019.
What happened to each town
-
62 ha reached on 13 Oct7.0 %
-
Messegães, Valadares e Sá 553 inhabitants · 1.3 km from the centre44 ha reached on 13 Oct5.3 %
-
Riba de Mouro 802 inhabitants · 2.2 km from the centre33 ha2.4 %
-
União das Freguesias de Ceivães e Badim 553 inhabitants · 2.1 km from the centre29 ha3.3 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Other natural land61 %
- Scrub and transitional woodland29 %
- Mixed forest6.9 %
- Coniferous forest3.1 %
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
Official record
According to ICNF, this fire started on 12 October 2023 and burned 335 ha (the satellite measured 169 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
- Monção Riba de Mouro 12 October 2023 · 21:30 335 ha · extinguished on 13 October 2023 · cause: negligence
ICNF (Instituto da Conservação da Natureza e das Florestas). This is the agency’s operational record: its figures may be revised when the year’s statistics are closed.
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) |
|---|---|---|---|---|---|
| 13 Oct | 19.9 °C | 41 % | 76 km/h | 13.8 mm | Very low 1 |
| 14 Oct after | 22.1 °C | 57 % | 27 km/h | 1.6 mm | Very low 1 |
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 12 October 2023 the air beside the fire reached 20 µg/m³ of PM2.5, but no daily average passed the WHO 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 · 8Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 3,893 haMonção MerufeOctober 2017 · 2 days · 9 km away
- 3,333 haAs NevesOctober 2017 · 1 day · 9 km away
- 6,662 haArcos de Valdevez Soajo8 August 2016 · 9 days · 20 km away
- 7,225 haPonte da Barca Entre Ambos-os-Rios, Ermida e GermilJuly 2025 · 11 days · 29 km away
- 3,096 haCarballeda de AviaAugust 2025 · 5 days · 31 km away
- 8,722 haPazos de BorbénOctober 2017 · 1 day · 34 km away
Frequently asked questions
- How long did the Monção fire last?
- Copernicus dates it between 13 October 2023 and 13 October 2023: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 169 hectares (1.7 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 4 municipalities: Penso (62 ha, 7.0 %); Messegães, Valadares e Sá (44 ha, 5.3 %); Riba de Mouro (33 ha, 2.4 %); União das Freguesias de Ceivães e Badim (29 ha, 3.3 %).
- Did the fire reach a town?
- The fire started in Penso and came within 1.1 km of its centre. That is the distance from the perimeter, or the nearest hotspot, to the point marking the centre; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 19.9 °C, humidity dropped to 41 % and gusts hit 76 km/h. The fire danger index (FWI) reached 1, class Very low.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Portugal (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 · Emergency number and official warnings ›
- ICNF · Instituto da Conservação da Natureza e das Florestas ↗
- ANEPC · Proteção Civil ↗
- Fogos.pt (ocorrências em tempo real) ↗
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: EFFIS (Copernicus), mapped on satellite imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 8 Suomi-NPP VIIRS detections on those dates.
- Compared with ICNF: 335 official ha against 169 ha of perimeter; similar, but with reservations.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
Where this data comes from
The perimeter and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. 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 (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.