Barcelona · 7.953 inhabitants · 2.933 buildings analysed one by one

Santa Eulàlia de RonçanaClimate risk in its neighbourhoods, streets and rivers, today and in 2050

We have scored the climate risk of the 2.933 buildings in Santa Eulàlia de Ronçana using Cadastre data, satellite imagery and climate projections, and added it up by area, street and watercourse. The clearest change comes at night: from 8 to 44 tropical nights a year by 2050.

8→44tropical nights a year in a typical building, today and by 2050
62%of homes at high or very high wildfire risk by 2050
265homes in the official flood zone (500 years)
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

Santa Eulàlia de Ronçana compared with Spain

  • Tropical nights a year, 2050: 62 nights
    higher than 86 % of municipalities
  • Average summer maximum, 2050: 31,9 °C
    lower than 58 % of municipalities
  • Flood-prone area (100-year): 0,0%
    lower than 80 % of municipalities
  • Area burnt 2016-2026: 0,0%
    lower than 64 % of municipalities
  • Water stress 2050 (0-5): 4,9
    higher than 61 % 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 Santa Eulàlia de Ronçana

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

1

265 homes in a flood zone

265 homes

They are in the area that can flood once every 500 years according to the official maps (SNCZI); 253 of them are in the 100-year area. Next to Riu Tenes, 182 homes are inside the flood zone, less than 100 m from the watercourse.

According to the Ministry’s studies, this is an annual probability of 0,2 % (500 years) or 1 % (100 years), not “once every 500 years”: it can happen two years in a row. Small gullies are not always mapped.

2

From 8 to 44 tropical nights a year

8→44 nights

In a typical building in Santa Eulàlia de Ronçana, nights when the temperature stays at or above 20 °C would rise from 8 a year (1991-2020) to about 44 by 2050. For this reason, 79 % of homes would be at a high or very high level.

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

3

Where there are fewer trees, 3,9 °C hotter

3,9 °C

Around homes with between 2 and 5 % tree cover, the surface in summer is 2,5 °C above the median for Santa Eulàlia de Ronçana; with more than 40 % tree cover, 1,4 °C below. 0 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.

4

1.947 homes at very high wildfire risk

1.917 buildings

These are 1.917 buildings right next to vegetation that can burn. Of these, 2 are blocks of flats with 56 homes, where evacuation is harder.

  • Camí de Can Brunomestre: 32
  • Plaça de l'Ajuntament: 24

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

5

54 in every 100 buildings were built before 1980

54 %

They were built before the first thermal insulation standard (1979). With 44 tropical nights a year by 2050, they will hold the most heat at night and have the most to gain from a retrofit.

Year of construction from the Cadastre.

Six hazards

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

The 3.162 homes in Santa Eulàlia de Ronçana 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 1 schools with the hottest surroundings.
  • Review with the river basin authority the watercourses with no official mapping that run next to homes, and keep them clear.
  • 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.
  • If you live on a ground floor or have a garage next to a watercourse, have a plan: where to go upstairs, what to switch off and how to hear about warnings.
  • 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