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ES · Spain · –

Burgohondo fire, July 2026 San Martín de Valdeiglesias, Cebreros, El Tiemblo

Out · last detection 9 Aug 2026, 13:33 UTC

The fire started on 16 July 2026 in El Barraco, Spain, and satellites saw it burning for 25 days. Copernicus mapped a burnt perimeter of 63,974 hectares from satellite imagery, spread across 28 municipalities.

It is the largest fire in Ávila since 2016 (of 29 with a page). The largest in Spain in 2026, of 196.

Burnt area
63,974ha
Copernicus perimeter
Duration
≈ 25days
16 Jul 2026 – 9 Aug 2026
Municipalities hit
28
municipalities
Started on
16 Jul
2026
Heat detections
3,601
in a single hotspot: 444 MW
Danger at start
60
Extreme · FWI index
Average daily power
7.2GW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 16 Jul9 Aug
9 Aug 2026

How it evolved, day by day

16 Jul 2026 · 13 MW · 1 22 Jul 2026 · 5,201 MW · 72 23 Jul 2026 · 18,086 MW · 303 24 Jul 2026 · 20,656 MW · 616 25 Jul 2026 · 15,449 MW · 925 26 Jul 2026 · 11,500 MW · 1212 27 Jul 2026 · 8,245 MW · 438 28 Jul 2026 · 39 MW · 23 30 Jul 2026 · 0 MW · 1 1 Aug 2026 · 166 MW · 8 9 Aug 2026 · 33 MW · 2
16 Jul 24 Jul 27 Jul 1 Aug

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

Fire front film How it spread from one satellite pass to the next (23 passes) and with what wind. Watch the film

The weather it burned in

35°high
58km/h · peak gust
8%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started.

This area had burned before

2% of the perimeter overlaps earlier fires recorded since 2016: 50 ha in 2016, 29 ha in 2018, 95 ha in 2019, 329 ha in 2020, 4 ha in 2021, 272 ha in 2022, 225 ha in 2025.

How big is it?

10 km
It burned the equivalent of 40% of the area of London (640 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. San Martín de Valdeiglesias 9,324 inhabitants · fire reached the centre
    7,649 ha reached on 23 Jul
    66 %
  2. Cebreros 3,345 inhabitants · 0.5 km from the centre
    5,981 ha reached on 25 Jul
    43 %
  3. El Tiemblo 4,582 inhabitants · fire reached the centre
    5,558 ha reached on 24 Jul
    74 %
  4. El Barraco 2,086 inhabitants · 2.9 km from the centre where it started
    5,249 ha reached on 16 Jul
    34 %
  5. Piedralaves 2,183 inhabitants · fire reached the centre
    4,673 ha reached on 22 Jul
    85 %
  6. Navas del Rey 3,420 inhabitants · fire reached the centre
    4,536 ha reached on 24 Jul
    90 %
  7. Navaluenga 2,135 inhabitants · 0.7 km from the centre
    4,189 ha reached on 22 Jul
    57 %
  8. Villa del Prado 7,743 inhabitants · fire reached the centre
    3,539 ha reached on 23 Jul
    46 %
  9. La Adrada 2,853 inhabitants · fire reached the centre
    3,451 ha reached on 24 Jul
    59 %
  10. Casavieja 1,362 inhabitants · fire reached the centre
    3,424 ha reached on 25 Jul
    87 %
  11. Robledo de Chavela 4,818 inhabitants · 1.2 km from the centre
    3,016 ha reached on 25 Jul
    32 %
  12. Burgohondo 1,269 inhabitants · 2.4 km from the centre
    2,064 ha reached on 22 Jul
    37 %
  13. 1,720 ha reached on 25 Jul
    35 %
  14. Sotillo de la Adrada 5,081 inhabitants · 0.6 km from the centre
    1,709 ha reached on 24 Jul
    39 %
  15. Fresnedillas de la Oliva 1,883 inhabitants · fire reached the centre
    1,251 ha reached on 25 Jul
    44 %
  16. La Iglesuela del Tiétar 448 inhabitants · 2.1 km from the centre
    1,014 ha reached on 26 Jul
    15 %
  17. San Juan de la Nava 422 inhabitants · 5.0 km from the centre
    984 ha reached on 23 Jul
    16 %
  18. Chapinería 2,044 inhabitants · fire reached the centre
    636 ha reached on 25 Jul
    25 %
  19. Pelayos de la Presa 3,195 inhabitants · fire reached the centre
    619 ha reached on 24 Jul
    81 %
  20. Mijares 718 inhabitants · 1.8 km from the centre
    597 ha reached on 26 Jul
    13 %
  21. El Hoyo de Pinares 2,179 inhabitants · 2.5 km from the centre
    515 ha reached on 25 Jul
    6.4 %
  22. Navahondilla 359 inhabitants · 2.5 km from the centre
    367 ha reached on 25 Jul
    17 %
  23. Aldea del Fresno 3,503 inhabitants · 2.9 km from the centre
    361 ha reached on 24 Jul
    7.0 %
  24. Valdemaqueda 870 inhabitants · 5.9 km from the centre
    344 ha reached on 27 Jul
    6.6 %
  25. Casillas 673 inhabitants · 0.5 km from the centre
    328 ha reached on 25 Jul
    27 %
  26. Almorox 2,569 inhabitants · 3.5 km from the centre
    243 ha reached on 23 Jul
    3.8 %
  27. Navalagamella 3,169 inhabitants · 3.4 km from the centre
    19 ha reached on 25 Jul
    0.2 %
  28. Cadalso de los Vidrios 3,372 inhabitants · 5.1 km from the centre
    5 ha
    0.1 %

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

  • Mixed forest26 %
  • Sclerophyllous scrub21 %
  • Coniferous forest19 %
  • Broadleaved forest10 %
  • Agricultural areas10 %
  • Other natural land7.7 %
  • Scrub and transitional woodland5.8 %
  • Artificial surfaces1.0 %

Natura 2000 protected area affected: 99 %

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.

People and buildings inside the perimeter

GHSL 2025
Built-up area233 ha
Residents≈ 8,000

Inside the perimeter there were about 233 hectares of built-up land and about 8,000 residents (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

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 Ávila · Incendio de Navaluenga · Incendio de Burgohondo
According to the sources, several fires that ended up merging:
  • Burgohondo (Ávila) 22 July 2026 37,800 ha
  • San Martín de Valdeiglesias (Madrid) 23 July 2026
  • Villa del Prado (Madrid) 22 July 2026
  • Conjunto Sierra Oeste de Madrid 22 July 2026 26,860 ha

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)

Started with Extreme FWI: 13 % of the area in Spain Strong wind: 22 % of the area in Spain 60 days without rain: 5.1 % of the area in Spain

Day High Min. humidity Peak gust Rain Danger (FWI)
16 Jul 30.6 °C 17 % 55 km/h 0.0 mm Extreme 60
17 Jul 30.5 °C 13 % 45 km/h 0.0 mm Extreme 54
18 Jul 31.4 °C 12 % 44 km/h 0.0 mm Extreme 55
19 Jul 31.7 °C 14 % 44 km/h 0.0 mm Extreme 54
20 Jul 31.4 °C 12 % 46 km/h 0.0 mm Extreme 58
21 Jul 32.8 °C 12 % 42 km/h 0.0 mm Extreme 55
22 Jul 34.5 °C 13 % 49 km/h 0.0 mm Extreme 57
23 Jul 33.7 °C 9 % 48 km/h 0.0 mm Extreme 68
24 Jul 28.1 °C 15 % 58 km/h 0.0 mm Extreme 70
25 Jul 25.1 °C 25 % 29 km/h 0.1 mm High 38
26 Jul 28.8 °C 15 % 19 km/h 0.0 mm High 34
27 Jul 31.6 °C 17 % 27 km/h 0.0 mm Very high 38
28 Jul 34.4 °C 15 % 30 km/h 0.0 mm Very high 40
29 Jul 34.4 °C 18 % 41 km/h 0.0 mm Very high 48
30 Jul 35.0 °C 14 % 46 km/h 0.0 mm Extreme 53
31 Jul 34.2 °C 8 % 48 km/h 0.0 mm Extreme 64
1 Aug 34.8 °C 13 % 53 km/h 0.0 mm Extreme 61
2 Aug 32.9 °C 15 % 40 km/h 0.0 mm Extreme 58
3 Aug 28.7 °C 24 % 48 km/h 0.4 mm Very high 49
4 Aug 30.7 °C 25 % 36 km/h 0.0 mm Very high 39
5 Aug 32.7 °C 22 % 30 km/h 0.0 mm High 37
6 Aug 34.7 °C 18 % 28 km/h 0.0 mm High 36
7 Aug 35.1 °C 12 % 36 km/h 0.0 mm Very high 49
8 Aug 34.5 °C 13 % 46 km/h 0.0 mm Very high 49
9 Aug 31.6 °C 16 % 49 km/h 0.0 mm Extreme 55
10 Aug after 32.5 °C 12 % 34 km/h 0.0 mm Very high 50
11 Aug after 32.5 °C 16 % 29 km/h 0.0 mm Extreme 50
12 Aug after 34.6 °C 12 % 29 km/h 0.0 mm Very high 45
13 Aug after 35.9 °C 13 % 31 km/h 0.0 mm Very high 44
14 Aug after 34.2 °C 17 % 34 km/h 0.0 mm Very high 44
15 Aug after 28.2 °C 23 % 32 km/h 0.7 mm Very high 39
16 Aug after 31.6 °C 15 % 23 km/h 0.0 mm High 31
17 Aug after 34.8 °C 15 % 24 km/h 0.0 mm Very high 39
18 Aug after 35.5 °C 15 % 36 km/h 0.0 mm Very high 40
19 Aug after 31.6 °C 20 % 50 km/h 0.0 mm Extreme 52

Its twins: fires that started in the same weather

It started with an FWI of 60.5, a minimum humidity of 17% and more than two months without rain. Fires in the area that started in weather like this since 2016: 35.

FWI at the start 60.5
Minimum humidity 17 %
Days without rain 60+
this fire chosen twins rest of the area
Almost identicalSimilar

Outlines of the closest twins

Chiloeches fire, July 2022
129 ha 2 days FWI 57.3 Min. humidity 15 % 118 km away, in 2022

First rain (1 mm or more) after it ended: none in the following ten days.

What happened to them

2 days
median duration
505 ha
median area
31 %
went past 1,000 ha
7.4 mm
rain at the end (median; 15 of 35 had it)

It was 126.7 times larger than the median of its twins and lasted 25 days, against 2 days.

None of its 35 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 20 of 35, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 7.4 mm.

This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it

How it ended

—first rain
—no rain in ten days
58km/h · max. gust

It was considered over on 9 Aug, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 15 of 35, with a median of 7.4 mm.

Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

How a twin is chosen

  • Same area: fires that have already ended, less than 250 km from this one, since 2016.
  • Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
  • Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
  • Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
  • They are sorted by similarity, and the outlines of the first five are drawn.

How we calculate it

Before and after, from space

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

Before · 9 Jul 2026
After · 16 Aug 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 28 July 2026 the air beside the fire reached 1,127 µg/m³ of PM2.5. That day averaged 444: 30 times the WHO daily guideline (15).

PM2.5 peak1,127 µg/m³
Days over the guideline6 days
PM101,569 µg/m³
Optical depth2.28
20 Jul24 Jul28 Jul1 Aug
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 · 3,601Every 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 Burgohondo fire last?
The official perimeter only gives the start date (22 July 2026). The end comes from the heat detections inside the perimeter: it burned until 9 August 2026 (25 days from 16 July 2026), the last day with detections before more than 10 days in a row without any, so it is approximate.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 63,974 hectares (639.7 km²). Official national figures may differ.
Which municipalities burned?
The fire entered 28 municipalities: San Martín de Valdeiglesias (7,649 ha, 66 %); Cebreros (5,981 ha, 43 %); El Tiemblo (5,558 ha, 74 %); El Barraco (5,249 ha, 34 %); Piedralaves (4,673 ha, 85 %); Navas del Rey (4,536 ha, 90 %); Navaluenga (4,189 ha, 57 %); Villa del Prado (3,539 ha, 46 %); La Adrada (3,451 ha, 59 %); Casavieja (3,424 ha, 87 %); Robledo de Chavela (3,016 ha, 32 %); Burgohondo (2,064 ha, 37 %).
Did the fire reach a town?
The fire reached the centre of Pelayos de la Presa: the point marking it was inside the burnt area or less than 500 metres from it. That does not mean houses burned.
What was the weather like?
During the fire the temperature reached 35.1 °C, humidity dropped to 8 % and gusts hit 58 km/h. The fire danger index (FWI) reached 70, class Extreme.
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.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 35. Their median duration was 2 days and their median area 505 ha; 31 % went past 1,000 ha. None of its 35 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 20 of 35, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 7.4 mm.

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

Satellite cross-check

History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Start date: 22 July 2026 → 16 July 2026.

RSS Changes to this page With cross-checks and a citable version

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.

How we know this
  • Perimeter: EFFIS (Copernicus), mapped on satellite imagery; 3 polygons grouped in this page.
  • The official perimeter has no end date: the end is the last day with VIIRS detections inside the perimeter before a gap of more than 10 days (150 days at most), so it is approximate. 3,601 Suomi-NPP VIIRS detections on those dates.
  • We have not matched this page with any official record.
  • Checked against news and agencies: 4 confirmed sources.
  • 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.

How we build fire pages: methodology

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.