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Orés fire, July 2026 Uncastillo, Luesia, Asín

Out · last measured on 15 Jul 2026

The fire started on 15 July 2026 in Biota, Spain, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 15,045 hectares from satellite imagery, spread across 6 municipalities.

It is the largest fire in Zaragoza since 2016 (of 18 with a page). Number 5 in Spain in 2026, of 195.

Burnt area
15,045ha
Copernicus perimeter
Duration
1day
15 Jul 2026 – 15 Jul 2026
Municipalities hit
6
municipalities
Started on
15 Jul
2026
Heat detections
301
in a single hotspot: 256 MW
Danger at start
30
High · FWI index
Natura 2000
1%
of the perimeter is protected land

Where it burned

HOTSPOTS BY DAY 15 Jul15 Jul

The weather it burned in

36°high
17km/h · peak gust
12%lowest humidity

It had gone 6 days without rain (1 mm or more) when it started.

This area had burned before

0% of the perimeter overlaps earlier fires recorded since 2016: 65 ha in 2024.

What happened to each town

  1. Uncastillo 29 inhabitants · 4.2 km from the town
    6,336 ha reached on 17 Jul
    27 %
  2. Luesia 332 inhabitants · 0.6 km from the town
    3,778 ha reached on 17 Jul
    30 %
  3. Asín 88 inhabitants · 0.0 km from the town
    1,678 ha reached on 18 Jul
    90 %
  4. Biota 832 inhabitants · 3.5 km from the town where it started
    1,554 ha reached on 17 Jul
    12 %
  5. Orés 72 inhabitants · 0.4 km from the town
    1,505 ha
    27 %
  6. Ejea de los Caballeros 17,129 inhabitants · 12.8 km from the town
    204 ha reached on 18 Jul
    0.3 %

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

  • Sclerophyllous scrub39 %
  • Agricultural areas33 %
  • Scrub and transitional woodland9.7 %
  • Mixed forest7.7 %
  • Other natural land5.9 %
  • Broadleaved forest2.8 %
  • Coniferous forest1.8 %

Natura 2000 protected area affected: 1 %

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.

Checked against the press

Checked on 29 September 2026

We checked this page against 4 sources published once the fire was out. This is what they add:

Also known as
Incendio de Orés · Incendio de las Cinco Villas · Incendio de Cinco Villas (Zaragoza)
Official area reported: 14,400 ha (the satellite measured 15,045 ha)
Declared under control (not yet extinguished): 21 July 2026

Sources

Official figures are measured differently from satellite ones and sometimes cover only part of the fire.

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)
15 Jul 35.8 °C 12 % 17 km/h 0.1 mm High 30
16 Jul after 35.2 °C 11 % 32 km/h 0.7 mm Very high 45
17 Jul after 32.2 °C 17 % 16 km/h 0.0 mm High 32
18 Jul after 34.0 °C 16 % 15 km/h 0.0 mm High 33
19 Jul after 34.3 °C 13 % 14 km/h 0.0 mm High 34
20 Jul after 36.5 °C 7 % 16 km/h 0.4 mm Very high 42
21 Jul after 35.5 °C 14 % 22 km/h 0.0 mm Very high 48
22 Jul after 36.3 °C 16 % 18 km/h 0.0 mm Very high 44
23 Jul after 36.8 °C 11 % 21 km/h 0.0 mm Extreme 50
24 Jul after 37.2 °C 8 % 40 km/h 0.0 mm Very extreme 80
25 Jul after 26.8 °C 29 % 31 km/h 0.2 mm Very high 48

Before and after, from space

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

Before · 8 Jul 2026
After · 22 Jul 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 18 July 2026 the air beside the fire reached 83 µg/m³ of PM2.5. That day averaged 26: 1.7 times the WHO daily guideline (15).

PM2.5 peak83 µg/m³
Days over the guideline1 day
PM10118 µg/m³
Optical depth0.48
131415161718
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 · 301Every 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 Spain ›

Frequently asked questions

How long did the Orés fire last?
Copernicus dates it between 15 July 2026 and 15 July 2026: 1 day between the first and last image with fire.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 15,045 hectares (150.4 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 6 municipalities: Uncastillo (6,336 ha, 27 %); Luesia (3,778 ha, 30 %); Asín (1,678 ha, 90 %); Biota (1,554 ha, 12 %); Orés (1,505 ha, 27 %); Ejea de los Caballeros (204 ha, 0.3 %).
Did the fire reach a town?
The closest fire to a town centre came within 0.0 km of Asín. 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 35.8 °C, humidity dropped to 12 % and gusts hit 17 km/h. The fire danger index (FWI) reached 30, class High.
Where does this data come from?
From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Spain (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
What do you think is wrong?

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 (Creative Commons Attribution 4.0 International (CC BY 4.0)). 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.