How Athens is Living with Extreme Heat

Athens knows heat. The city has long endured dry summers and crowded streets that radiate warmth well into the night. But in recent years, that familiar discomfort has escalated into a public-health emergency. The year 2024 was Europe’s hottest on record, and in Athens, night-time temperatures often stayed above 30°C. Hospital visits rose, productivity fell, and metro stations became de-facto cooling shelters.

Rather than treating these symptoms one heatwave at a time, Athens is reframing heat as a systemic urban challenge — one that cuts across housing, health, planning, and social policy. This shift, detailed in the new Building Resilience to Heat in the City of Athens report by the Resilient Cities Network, offers a playbook for other cities facing the same reality. Below are some of the key lessons pulled from the report.

1. Make heat governance everyone’s business

Athens appointed Europe’s first Chief Heat Officer in 2021. What began as an emergency response role has evolved into a permanent governance structure that brings together departments for environment, civil protection, and social welfare. The Heat Office now coordinates seasonal planning, early-warning systems, and cooling interventions across agencies.

This institutional home for heat has proven critical. Interviews with ministries and municipal teams under the EU-funded ARSINOE programme showed that siloed responsibilities were among the biggest barriers to progress. Establishing clear ownership — while embedding cross-departmental teams — is what turned scattered initiatives into a city-wide strategy.

2. Focus on awareness, preparedness, and redesign

The Athens strategy rests on three pillars:

• Awareness — public education campaigns, heat alerts, and school outreach that make risks visible and actionable.

• Preparedness — emergency plans, cooling centres, and worker protection measures coordinated through municipal networks.

• Redesign - longer-term urban changes, from tree planting and cool materials to nature-based schoolyards that double as community refuges.

This structure keeps communication simple and operational. It helps residents understand what to do before, during, and after heatwaves, and it helps agencies plan investments coherently.

3. Treat data as a public service

Athens piloted digital tools that translate complex climate data into decisions. For example, the DT-HEAT+ dashboard combines satellite data, health indicators, and urban design layers to identify heat-risk hotspots. By visualising who is most exposed — and where — the city can prioritise investments in shading, water access, and emergency outreach.

Such spatial tools can be adapted easily by other municipalities using open data and modest technical support. The real innovation lies in linking data to mandates: when the Heat Office updates its maps, social services and civil protection departments act on them.

4. Align funding and community action

Resilience funding often chases innovation rather than maintenance. Athens’ experience shows that small, visible, community-based projects — like the OASIS Schoolyards programme that transforms asphalt playgrounds into green learning spaces — can unlock broader political support and attract donors.

Partnerships with the private sector and citizen groups have helped stretch limited budgets while strengthening public trust. The takeaway: scale starts with credibility, not capital.

5. Build solidarity through storytelling

Perhaps most striking is how Athens made heat a shared story rather than an expert concern. The Heat Office collaborated with universities, NGOs, and artists to create public exhibitions, VR experiences, and media campaigns that frame cooling as collective care, not just infrastructure.

That cultural shift matters. Heatwaves are silent disasters — often invisible until too late. By humanising the threat, the city has changed how citizens, businesses, and policymakers talk about adaptation.

Why this matters for other cities

Across Europe, heat now accounts for 85% of all weather-related fatalities. Labour productivity losses in central Athens already exceed €90 million annually and could more than double by mid-century. Every city will feel similar pressures — on health systems, electricity grids, and social equity — as temperatures rise.

Athens’ model shows that progress is possible without waiting for perfect coordination or vast new funds. It starts with naming heat as a governance issue, building practical alliances, and communicating simply.

The full report is available at https://doi.org/10.5281/zenodo.17243305