We have scored the climate risk of the 5.586 buildings in Alcanar using Cadastre data, satellite imagery and climate projections, and added it up by area, street and watercourse. The clearest change comes at night: from 52 to 85 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.
These are 1.613 buildings right next to vegetation that can burn. Of these, 22 are blocks of flats with 923 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.
In a typical building in Alcanar, nights when the temperature stays at or above 20 °C would rise from 52 a year (1991-2020) to about 85 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 0,8 °C above the median for Alcanar; with more than 40 % tree cover, 2,4 °C below. 966 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.
They were built before the first thermal insulation standard (1979). With 85 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.
Along Barranc de Sant Jaume (2,2 km within the municipality, dry most of the year) there is no official mapped flood zone, but there are 263 homes less than 50 m from the watercourse.
Having no official map does not mean it cannot overflow: watercourses that are dry most of the year are the ones that cause the most surprises in a storm.
The 8.335 homes in Alcanar 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 893 municipalities with between 5.000 and 20.000 inhabitants. The bar shows where Alcanar stands: further right means more risk.
| Indicator | Alcanar | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 60 nights | 10 nights | higher than 94 % of them |
| Tropical nights a year, 2050 | 113 nights | 48 nights | higher than 94 % of them |
| Average summer maximum, 2050 | 31,1 °C | 32,4 °C | lower than 62 % of them |
| Night-time heat island | 0,5 °C | 0,4 °C | higher than 55 % of them |
| Flood-prone area (100-year) | 1,8% | 1,2% | higher than 57 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 67 % of them |
| Water stress 2050 (0-5) | 4,1 | 4,8 | lower than 63 % of them |
| Maximum 50-year gust | 27 m/s | 30 m/s | lower than 81 % of them |
| Ground movement | −0,4 mm/yr | −0,6 mm/yr | sinking more slowly than 59 % of them |
| Population aged 65 or over | 22% | 20% | higher than 70 % of them |
Compared with the 184 municipalities in Tarragona province. The bar shows where Alcanar stands: further right means more risk.
| Indicator | Alcanar | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 60 nights | 15 nights | higher than 95 % of them |
| Tropical nights a year, 2050 | 113 nights | 68 nights | higher than 96 % of them |
| Average summer maximum, 2050 | 31,1 °C | 32,6 °C | lower than 94 % of them |
| Night-time heat island | 0,5 °C | 0,3 °C | higher than 62 % of them |
| Flood-prone area (100-year) | 1,8% | 0,0% | higher than 73 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 61 % of them |
| Water stress 2050 (0-5) | 4,1 | 5,0 | lower than 58 % of them |
| Maximum 50-year gust | 27 m/s | 29 m/s | lower than 71 % of them |
| Ground movement | −0,4 mm/yr | −0,4 mm/yr | sinking faster than 51 % of them |
| Population aged 65 or over | 22% | 23% | lower than 56 % of them |
Compared with the 948 municipalities in Catalonia. The bar shows where Alcanar stands: further right means more risk.
| Indicator | Alcanar | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 60 nights | 5 nights | higher than 98 % of them |
| Tropical nights a year, 2050 | 113 nights | 51 nights | higher than 98 % of them |
| Average summer maximum, 2050 | 31,1 °C | 31,7 °C | lower than 62 % of them |
| Night-time heat island | 0,5 °C | 0,2 °C | higher than 65 % of them |
| Flood-prone area (100-year) | 1,8% | 0,2% | higher than 67 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 59 % of them |
| Water stress 2050 (0-5) | 4,1 | 4,4 | lower than 61 % of them |
| Maximum 50-year gust | 27 m/s | 27 m/s | lower than 62 % of them |
| Ground movement | −0,4 mm/yr | −0,3 mm/yr | sinking faster than 55 % 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 Alcanar stands: further right means more risk.
| Indicator | Alcanar | Group median | Position |
|---|---|---|---|
| Tropical nights a year, today | 60 nights | 0 nights | higher than 98 % of them |
| Tropical nights a year, 2050 | 113 nights | 8 nights | higher than 98 % of them |
| Average summer maximum, 2050 | 31,1 °C | 32,4 °C | lower than 66 % of them |
| Night-time heat island | 0,5 °C | 0,1 °C | higher than 75 % of them |
| Flood-prone area (100-year) | 1,8% | 0,6% | higher than 64 % of them |
| Area burnt 2016-2026 | 0,0% | 0,0% | lower than 64 % of them |
| Water stress 2050 (0-5) | 4,1 | 4,6 | lower than 66 % of them |
| Maximum 50-year gust | 27 m/s | 31 m/s | lower than 86 % of them |
| Ground movement | −0,4 mm/yr | −0,4 mm/yr | sinking more slowly than 53 % 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 5.586 Cadastre buildings in Alcanar 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).