Record Heatwaves Hit Major Cities in 2025: Impact and Outlook

Background

Over recent decades, the frequency and severity of heatwaves have increased worldwide. Climate scientists have repeatedly warned that global warming will continue to drive extreme weather phenomena, putting millions at risk and challenging urban infrastructure.

What is happening now

In the summer of 2025, several major cities across Europe, North America, and Asia are experiencing record-breaking temperatures. Cities like Paris, Madrid, New York, and Tokyo have recorded new highs, with some areas enduring sustained heat above 40°C (104°F). Emergency services in many cities are reporting increased heat-related incidents, and public health warnings have been issued.

Impact on Switzerland

Switzerland is also experiencing higher-than-normal summer temperatures. Several Swiss cities, including Zurich, Geneva, and Basel, have reported heat spikes, prompting local authorities to open cooling centers and extend support for vulnerable populations. The heat has also raised concerns about energy supply and the risk of wildfires in alpine regions. Public transport systems are under additional strain as people seek relief in cooler environments.

What happens next

Authorities are monitoring weather conditions closely and reviewing emergency response protocols. Experts stress the importance of urban planning geared towards heat resilience, including green spaces and improved building standards. Ongoing research in Switzerland and across Europe aims to better predict and mitigate the impact of future heatwaves. Meanwhile, residents are encouraged to follow official advice on hydration, exposure, and community support during periods of extreme heat.