# Urban heat and climate risk in Attica

> Live situation record from CLSTR: https://clstr.news/situations/urban-heat-and-climate-risk-in-attica
> Updated: 2026-09-12T05:46:48.000Z. Sources: 13. Developments: 2.

Research conducted by the National Observatory of Athens and the National and Kapodistrian University of Athens has identified significant urban heat island effects within the Attica basin. A decade-long study using satellite imagery revealed land surface temperature hot spots reaching 9 to 10 degrees Celsius higher than reference areas, with central Athens experiencing afternoon air temperatures up to 5 degrees Celsius higher than suburban regions.

Building on these findings, the CLIMASPIN project—a collaboration between the National and Kapodistrian University of Athens and the University of Thessaly—projects a significant increase in heatwave climate risk for the Attica region through 2060. Comparing the 2031–2060 period to the 1981–2010 baseline, Professor Kostas Kartalis notes that while risk is currently high in central Athens and Elefsina, it is expected to intensify across the entire prefecture.

Specifically, the greater Athens metropolitan area, extending toward Elefsina and Megara, is projected to reach a ‘very high risk’ category, while the Mesogeia region is expected to see its risk level rise from low to high. To reach these conclusions, researchers utilized multiple indicators, including the frequency of heatwave episodes, days exceeding 35 degrees Celsius, and ‘tropical nights’ where temperatures remain above 25 degrees Celsius.

Experts emphasize that addressing these vulnerabilities requires integrating urban planning with climate change adaptation. Assessments have integrated social and urban factors, such as vegetation indices, building density, proximity to green spaces, and the percentage of the population over age 65.

## Claims

- Heatwave climate risk in the Attica region is expected to increase significantly between 2031 and 2060 compared to 1981-2010. (corroborated by 2 sources)
- Heatwave risk is currently high in central Athens and Elefsina. (corroborated by 2 sources)
- The risk level in the Mesogeia area is projected to rise from low to high. (corroborated by 2 sources)
- Urban areas extending to Elefsina and Megara are expected to reach a ‘very high risk’ category by 2031-2060. (single source)
- Climate risk assessment includes factors such as cooling degree days, heatwave episodes, and tropical nights. (single source)
- Vulnerability analysis incorporates social, urban, and environmental data including vegetation indices and population age. (single source)

## Timeline

### 2026-09-12: Attica heatwave risk projected to increase significantly by 2060

A study by Greek universities warns that heatwave risks in Attica, including Athens and Elefsina, will increase significantly by 2060, necessitating climate-responsive urban planning.

11 sources. https://clstr.news/cluster/attica-heatwave-risk-projected-to-rise-significantly-by-2060

### 2026-08-31: Athens urban heat islands show temperature gaps up to 10°C

A study by the National Observatory of Athens reveals that urban heat islands cause temperature differences of up to 10°C in certain Athens neighborhoods due to density and lack of greenery.

2 sources. https://clstr.news/cluster/athens-urban-heat-islands-show-temperature-gaps-up-to-10c

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Cite as: Urban heat and climate risk in Attica. CLSTR, https://clstr.news/situations/urban-heat-and-climate-risk-in-attica