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Photo credits: Thomas Gravanis - This is Athens

Athens

Cooling Havens - Water-Powered Neighborhood Cooling and Engagement Stations

Greening cities

Ongoing

Cooling Havens tackles Athens' climate challenges, from extreme urban heat to periodic floods –problems that are worsened by the city’s lack of water-sensitive design and predominance of impermeable surfaces. The project  proposes neighbourhood-specific, water-powered cooling stations that use alternative water harnessing techniques, establishing new blue and green infrastructure. The cooling stations also serve as educational hubs, fostering awareness of water conservation and connecting the community with local water heritage. This reintroduces water as a core feature of Athens' public spaces, promoting a water-centric urban lifestyle.

Our main challenges...

  • Extreme urban heat: Athens faces increasingly high temperatures and severe heatwaves, exacerbated by urban heat islands and limited adaptive infrastructure, making it one of Europe’s most heat-vulnerable cities.

  • Absence of water elements: Athens lacks natural water features, intensifying the urban heat effect. The burying of rivers and streams prevents natural cooling, making new sustainable water management and water-sensitive design essential.

  • Outdated urban planning: Rapid, unplanned urbanisation has filled Athens with heat-retaining materials like concrete and asphalt. Urban design also lacks water-sensitivity, with 80% of surfaces impermeable and unable to manage heavy rain.

and proposed solutions

  • Water-sensitive urban design, creating 4 blue-green areas such as rainwater gardens and bioswale wetlands. This brings natural cooling to public spaces, reducing urban heat and creating vibrant, climate-resilient community areas.

  • A sewer-mining water garden that transforms wastewater into irrigation for green spaces. This creates a self-sustaining water source while enhancing biodiversity and cooling local public areas.

  • A new Athens Water School and Digital Lab for Water Memories, providing hands-on education and training programmes on sustainable water management, equipping citizens, students and city officials to adopt and maintain water-sensitive practices.

Key figures

637 798
inhabitants live in Athens Municipality
27.7 °C
average temperature in Athens during the summer months
129
average number of days per year with a maximum daily temperature above 26 °C in Athens
700
rivers and streams crossing Athens at the beginning of the 19th century that are now buried below the concrete surface of the city
7500 m2
of blue/green infrastructure aimed at climate adaptation and cooling public spaces generated by the Cooling Havens project

Milestones

Site selection and initial community engagement
Jan 2025
Preliminary designs and launch of educational workshops
May 2025
Design and installation of temporary cooling stations
Jul 2025
Launch of open data portal and smart metering
Jun 2026
Completion of large-scale cooling stations and public demonstrations
Nov 2027
1. Site selection and initial community engagement
01 - 31 Jan 2025

Intervention sites finalised and initial community engagement activities launched

2. Preliminary designs and launch of educational workshops
01 - 31 May 2025

Preliminary designs finalised: workshops with schools and communities begin

3. Design and installation of temporary cooling stations
01 - 31 Jul 2025

Design and installation of two mobile cooling stations completed in high-need areas

4. Launch of open data portal and smart metering
01 - 30 Jun 2026

Open data portal developed, and smart meters installed to provide real-time data on intervention sites

5. Completion of large-scale cooling stations and public demonstrations
01 - 30 Nov 2027

Large-scale cooling interventions completed, including a sewer mining plant