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Aveiro fire, September 2026 Eixo e Eirol, Requeixo, Nossa Senhora de Fátima e Nariz

Out · last detection 19 Sept 2026, 12:46 UTC

The fire started on 18 September 2026 in Requeixo, Nossa Senhora de Fátima e Nariz, Portugal, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 196 hectares from satellite imagery, spread across 2 municipalities. According to ICNF, it was detected on 18 September 2026 at 12:30 and declared extinguished on 19 September 2026.

Number 43 in Portugal in 2026, of 78.

Burnt area
196ha
Copernicus perimeter
Duration
1day
18 Sept 2026 – 18 Sept 2026
Municipalities hit
2
freguesias
Started on
18 Sept
2026
Heat detections
11
in a single hotspot: 55 MW
Danger at start
12
Moderate · FWI index
Energy released
296MW
sum of detected power

Where it burned

19 Sept 2026
HOTSPOTS BY DAY 18 Sept18 Sept

How it evolved, day by day

1819

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

31°high
39km/h · peak gust
37%lowest humidity

It had gone 9 days without rain (1 mm or more) when it started. Rain came after the fire: 1.1 mm on 28 Sept.

This area had burned before

91% of the perimeter overlaps earlier fires recorded since 2016: 179 ha in 2017, 6 ha in 2023.

What happened to each town

  1. Eixo e Eirol 6,190 inhabitants · 1.5 km from the town
    108 ha
    4.8 %
  2. Requeixo, Nossa Senhora de Fátima e Nariz 4,383 inhabitants · 3.0 km from the town where it started
    88 ha
    2.7 %

Burnt area inside each municipality, from crossing the official 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.

What burned

  • Broadleaved forest51 %
  • Mixed forest45 %
  • Other natural land3.1 %
  • Agricultural areas1.0 %

Natura 2000 protected area affected: 2 %

Natura 2000 sites (European Environment Agency, 2024 release) crossed by the perimeter.

Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.

Official record

According to ICNF, this fire started on 18 September 2026 and burned 201 ha (the satellite measured 196 ha).

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)
18 Sept 25.5 °C 48 % 39 km/h 0.0 mm Moderate 12
19 Sept after 30.8 °C 37 % 30 km/h 0.0 mm Moderate 15
20 Sept after 33.2 °C 32 % 31 km/h 0.0 mm Moderate 18
21 Sept after 34.2 °C 23 % 33 km/h 0.0 mm High 25
22 Sept after 31.2 °C 31 % 29 km/h 0.0 mm High 24
23 Sept after 26.1 °C 57 % 23 km/h 0.0 mm Moderate 13
24 Sept after 22.0 °C 73 % 24 km/h 0.0 mm Low 9
25 Sept after 21.9 °C 61 % 31 km/h 0.0 mm Low 10
26 Sept after 24.4 °C 63 % 23 km/h 0.0 mm Low 9
27 Sept after 23.0 °C 58 % 26 km/h 0.0 mm Low 10
28 Sept after 25.0 °C 63 % 28 km/h 1.1 mm Very low 5

Before and after, from space

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

Before · 11 Sept 2026
After · 25 Sept 2026

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 20 September 2026 the air beside the fire reached 22 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak22 µg/m³
Days over the guideline0 days
PM1024 µg/m³
Optical depth0.18
16171819202122
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 · 11Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Portugal ›

Frequently asked questions

How long did the Aveiro fire last?
Copernicus dates it between 18 September 2026 and 18 September 2026: 1 day between the first and last image with fire. According to ICNF, it was detected on 18 September 2026 at 12:30 and declared extinguished on 19 September 2026.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 196 hectares (2.0 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Eixo e Eirol (108 ha, 4.8 %); Requeixo, Nossa Senhora de Fátima e Nariz (88 ha, 2.7 %).
Did the fire reach a town?
The closest fire to a town centre came within 1.5 km of Eixo e Eirol. That is the distance to the perimeter or nearest hotspot; it does not mean it entered the houses.
What was the weather like?
During the fire the temperature reached 30.8 °C, humidity dropped to 37 % and gusts hit 39 km/h. The fire danger index (FWI) reached 15, class Moderate.
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

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
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We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 112.

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.