Extreme heat is reaching Europe’s most northern cities. These mayors are determined to solve it

illuminem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on Euronews or enjoy below:

🗞️ Driving the news: European cities from Athens to Oulu are confronting unprecedented heatwaves, with temperatures in northern cities now reaching levels previously only seen in the Mediterranean
• In response, more than 50 mayors worldwide have joined the UNEP 50@50 initiative, sharing solutions and stress-testing urban systems to protect residents from extreme heat

🔭 The context: Extreme heat is now the deadliest climate hazard globally, causing nearly 500,000 deaths per year
• Cities are deploying urban heat maps, heat action plans, and large-scale green infrastructure, including parks, tree-planting, shading systems, and microforests, to reduce thermal risk in dense urban areas
• Northern cities like Oulu are redesigning infrastructure originally built for cold climates to withstand summer heat

🌍 Why it matters for the planet: Rising urban temperatures exacerbate energy demand, strain health services, and amplify social vulnerability
• Heatwaves interact with climate-driven risks such as flooding and infrastructure stress, highlighting the need for climate-adaptive city planning
• Coordinated action across cities can reduce mortality, energy use, and emissions from urban heat islands while building resilience to climate extremes

⏭️ What’s next: Over the next year, a dozen cities are poised to conduct extreme heat stress tests, informed by shared models and real-world pilot projects
• Knowledge transfer via 50@50 aims to accelerate adaptation strategies and replicate successful urban cooling interventions globall

💬 One quote: “Extreme heat is already reshaping daily life in cities around the world. 50@50 helps local leaders move faster by sharing practical solutions that protect people, reduce inequality and strengthen urban resilience.” – Inger Andersen, UNEP Executive Director

📈 One stat: In Antalya, 2.56% of the territory’s built-up area contains around 56% of the population, overlapping with the city’s highest-risk heat zones, highlighting the concentration of vulnerability in dense urban neighborhoods

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