We have scored the climate risk of the 4.709 buildings in Cerdanyola del Vallès using Cadastre data, satellite imagery and climate projections, and added it up by area, street and watercourse. The clearest change comes at night: from 25 to 67 tropical nights a year by 2050.
Level of the highest hazard in each 250 m area by 2050: flooding, heat, wildfire, wind or ground movement.
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 →
It comes from matching each building with its neighbourhood, its street, the nearest watercourse and its surroundings.
They are in the area that can flood once every 500 years according to the official maps (SNCZI); 1.137 of them are in the 100-year area. Next to Riu Sec, 1.285 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.
In a typical building in Cerdanyola del Vallès, nights when the temperature stays at or above 20 °C would rise from 25 a year (1991-2020) to about 67 by 2050. For this reason, 100 % of homes would be at a high or very high level.
Median of the buildings. Intermediate-to-high emissions scenario (SSP3-7.0).
Around homes with less than 2 % tree cover, the surface in summer is 1,7 °C above the median for Cerdanyola del Vallès; with more than 40 % tree cover, 2,4 °C below. 439 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.
These are 1.507 buildings right next to vegetation that can burn. Of these, 3 are blocks of flats with 95 homes, where evacuation is harder.
Proximity to woodland and to burnt areas (ESA WorldCover, EFFIS). It does not measure the state of the vegetation or any firebreaks.
They are in the official 500-year flood zone or in a preferential flow zone. They are the first to review in an emergency plan: who is inside, how to get out and whether they use the ground floor.
OpenStreetMap location matched to the nearest Cadastre building.
The 23.151 homes in Cerdanyola del Vallès by the level of their building. Tap a hazard to see it on the map.
The same data for all 8.217 municipalities in Spain. Choose what to compare with: municipalities of a similar size, the province, the region or the whole of Spain.
Compared with the 365 municipalities with between 20.000 and 100.000 inhabitants. The bar shows where Cerdanyola del Vallès stands: further right means more risk.
| Indicator | Cerdanyola del Vallès | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 19 nights | 28 nights | lower than 58 % of them |
| Tropical nights a year, 2050 | 76 nights | 74 nights | higher than 52 % of them |
| Average summer maximum, 2050 | 30,5 °C | 32,0 °C | lower than 65 % of them |
| Night-time heat island | 0,8 °C | 0,7 °C | higher than 54 % of them |
| Flood-prone area (100-year) | 0,0% | 2,0% | lower than 89 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 66 % of them |
| Water stress 2050 (0-5) | 4,9 | 4,9 | lower than 55 % of them |
| Maximum 50-year gust | 25 m/s | 29 m/s | lower than 91 % of them |
| Ground movement | −0,6 mm/yr | −0,7 mm/yr | sinking more slowly than 59 % of them |
| Population aged 65 or over | 22% | 19% | higher than 82 % of them |
Compared with the 311 municipalities in Barcelona province. The bar shows where Cerdanyola del Vallès stands: further right means more risk.
| Indicator | Cerdanyola del Vallès | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 19 nights | 2 nights | higher than 76 % of them |
| Tropical nights a year, 2050 | 76 nights | 46 nights | higher than 77 % of them |
| Average summer maximum, 2050 | 30,5 °C | 30,9 °C | lower than 61 % of them |
| Night-time heat island | 0,8 °C | 0,3 °C | higher than 66 % of them |
| Flood-prone area (100-year) | 0,0% | 0,0% | lower than 72 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 57 % of them |
| Water stress 2050 (0-5) | 4,9 | 4,1 | higher than 78 % of them |
| Maximum 50-year gust | 25 m/s | 27 m/s | lower than 68 % of them |
| Ground movement | −0,6 mm/yr | −0,4 mm/yr | sinking faster than 64 % of them |
| Population aged 65 or over | 22% | 20% | higher than 71 % of them |
Compared with the 948 municipalities in Catalonia. The bar shows where Cerdanyola del Vallès stands: further right means more risk.
| Indicator | Cerdanyola del Vallès | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 19 nights | 5 nights | higher than 78 % of them |
| Tropical nights a year, 2050 | 76 nights | 51 nights | higher than 81 % of them |
| Average summer maximum, 2050 | 30,5 °C | 31,7 °C | lower than 72 % of them |
| Night-time heat island | 0,8 °C | 0,2 °C | higher than 78 % of them |
| Flood-prone area (100-year) | 0,0% | 0,2% | lower than 77 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 59 % of them |
| Water stress 2050 (0-5) | 4,9 | 4,4 | higher than 82 % of them |
| Maximum 50-year gust | 25 m/s | 27 m/s | lower than 76 % of them |
| Ground movement | −0,6 mm/yr | −0,3 mm/yr | sinking faster than 70 % of them |
| Population aged 65 or over | 22% | 22% | higher than 51 % of them |
Compared with the 8.217 municipalities in Spain. The bar shows where Cerdanyola del Vallès stands: further right means more risk.
| Indicator | Cerdanyola del Vallès | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 19 nights | 0 nights | higher than 86 % of them |
| Tropical nights a year, 2050 | 76 nights | 8 nights | higher than 91 % of them |
| Average summer maximum, 2050 | 30,5 °C | 32,4 °C | lower than 71 % of them |
| Night-time heat island | 0,8 °C | 0,1 °C | higher than 87 % of them |
| Flood-prone area (100-year) | 0,0% | 0,6% | lower than 80 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 64 % of them |
| Water stress 2050 (0-5) | 4,9 | 4,6 | higher than 61 % of them |
| Maximum 50-year gust | 25 m/s | 31 m/s | lower than 92 % of them |
| Ground movement | −0,6 mm/yr | −0,4 mm/yr | sinking faster than 60 % of them |
| Population aged 65 or over | 22% | 28% | lower than 73 % of them |
Values for the municipality as a whole (median over built-up land). The position is the percentage of municipalities in the group with a lower value: it is not a probability of damage. 2050 = SSP3-7.0 scenario.
Semicolon-separated tables with a decimal comma, ready to open in a spreadsheet or a GIS (areas include longitude and latitude).
What this is and what it is not. It is a guide-only analysis made with public data and models, with the same rules for every municipality. It does not replace official maps, a technical study or emergency plans. For your own building, look up its report.
Building by building. We have scored the 4.709 Cadastre buildings in Cerdanyola del Vallès with the same rules as each building’s report on Mi Riesgo Climático, from 0 to 100 for each hazard: low (up to 25), medium (up to 50), high (up to 75) and very high.
Aggregates only. To protect each owner, no individual building appears here: only 250 m areas with at least 3 buildings, and neighbourhoods and streets with at least 60 homes.
Wildfire and flooding. Wildfire counts proximity to woodland or scrubland of at least 100 ha (not urban parks or tree-lined streets). For flooding, besides the official flood zones, a building that was inside a real flood observed by satellite (Copernicus EMS, such as the 2024 DANA storm) is at least at high level.
2050. Average for 2041-2070 under an intermediate-to-high emissions scenario (SSP3-7.0). Tropical nights and heat change with the climate; flooding, wildfire, wind and ground movement are shown with current data when there is no projection.
Rivers and streams. Named watercourses from OpenStreetMap. We count the homes less than 50 and 100 m from the watercourse and, separately, how many of them are in an official flood zone (SNCZI). Being close does not mean they will flood, and having no official zone does not mean they cannot.
Neighbourhoods and streets. Neighbourhoods and districts from OpenStreetMap; streets according to the Cadastre address. The street heat index combines tropical nights in 2050 (35 %), heat island (30 %), lack of trees (20 %) and buildings from before 1980 (15 %).
Sources. Cadastre (buildings and addresses); ERA5 + CHELSA/CMIP6 MPI-ESM1-2-HR and AdapteCCa (tropical nights and temperature); Landsat 8/9 and MODIS (heat island); ESA WorldCover and EFFIS (wildfire); MITECO SNCZI (flood zones); JRC (coast); ERA5 + Global Wind Atlas (wind); Copernicus EGMS (ground movement); WRI Aqueduct (water); INE (population); OpenStreetMap, © contributors, ODbL (streets, neighbourhoods, rivers and facilities).