Madrid · 58.730 inhabitants · 8.896 buildings analysed one by one

Colmenar ViejoClimate risk in its neighbourhoods, streets and rivers, today and in 2050

We have scored the climate risk of the 8.896 buildings in Colmenar Viejo using Cadastre data, satellite imagery and climate projections, and added it up by area, street and watercourse. The clearest change comes at night: from 4 to 37 tropical nights a year by 2050.

4→37tropical nights a year in a typical building, today and by 2050
100%of homes at high or very high heat risk by 2050
318homes less than 100 m from Arroyo de Navarrosillos
At a glance

Where the risk lies by 2050

LowMediumHighVery highRivers and streams

Level of the highest hazard in each 250 m area by 2050: flooding, heat, wildfire, wind or ground movement.

Tropical nights a year in a typical building

Colmenar Viejo compared with Spain

  • Tropical nights a year, 2050: 28 nights
    higher than 62 % of municipalities
  • Average summer maximum, 2050: 34,6 °C
    higher than 75 % of municipalities
  • Flood-prone area (100-year): 0,9%
    higher than 54 % of municipalities
  • Area burnt 2016-2026: 2,8%
    higher than 88 % of municipalities
  • Water stress 2050 (0-5): 5,0
    higher than 82 % of municipalities

Position among the 8.217 municipalities: further right means more risk. These are figures for the municipality as a whole, the same for everyone; they may differ from those for the typical building. Compare with others →

What stands out

What we found in Colmenar Viejo

It comes from matching each building with its neighbourhood, its street, the nearest watercourse and its surroundings.

1

Where there are fewer trees, 4,3 °C hotter

4,3 °C

Around homes with less than 2 % tree cover, the surface in summer is 0,6 °C above the median for Colmenar Viejo; with more than 40 % tree cover, 3,7 °C below. 2.708 homes are in surroundings with almost no trees.

Ground surface temperature (Landsat), not air temperature. More trees usually go with less asphalt and lower density: this is a correlation, not a measure of the effect of planting trees.

2

From 4 to 37 tropical nights a year

4→37 nights

In a typical building in Colmenar Viejo, nights when the temperature stays at or above 20 °C would rise from 4 a year (1991-2020) to about 37 by 2050. For this reason, 1 % of homes would be at a high or very high level.

Median of the buildings. Intermediate-to-high emissions scenario (SSP3-7.0).

3

412 homes at very high wildfire risk

515 buildings

These are 515 buildings right next to vegetation that can burn. Almost all are houses (515), on the edges of the town and in housing estates.

Proximity to woodland and to burnt areas (ESA WorldCover, EFFIS). It does not measure the state of the vegetation or any firebreaks.

4

7 schools in heat islands

7 of 36

Schools whose surroundings are at least 1 °C hotter than the municipal median in summer. They are the first candidates for shade and tree-lined playgrounds.

Ground surface temperature (Landsat) around the building closest to the OpenStreetMap point.

Six hazards

How many homes are at high risk, today and in 2050

The 22.342 homes in Colmenar Viejo by the level of their building. Tap a hazard to see it on the map.

LowMediumHighVery high
What can be done

For the town council and for residents

For the town council and its technical staff

  • Climate shelters, and late-afternoon and evening opening hours at libraries and community centres in the areas with the most tropical nights.
  • Shade and trees in the playgrounds of the 7 schools with the hottest surroundings.
  • Firebreaks and evacuation routes in the streets that border woodland.
  • Download the tables by area, neighbourhood, street and watercourse (Data tab) to cross-check them with urban planning.

For residents

  • Air your home in the early hours, shade west-facing walls from the sun and ask about grants to insulate the roof.
  • Keep the strip around your house clear of dry vegetation and know both ways out of your street.
  • Look up your building: the free report gives its level for each hazard, and the Climate Note gives the full detail.

Look up your building