Record Heatwaves Hit Major Cities in 2025: Impacts and Responses

Background

In recent years, heatwaves have become more frequent and intense worldwide, driven by climate change and rapid urbanization. Scientists have warned that unless drastic action is taken, temperatures in many global cities will continue to rise, setting new records year after year. The 2025 summer season is now proving these predictions to be accurate.

What is happening now

Since early June 2025, major cities across Europe, North America, and Asia have recorded their highest-ever temperatures. Paris, London, New York, and Tokyo all saw consecutive days above 40°C, causing disruptions to transport, energy grids, and public health. Local governments have issued heat alerts and emergency measures to protect vulnerable populations. Health officials are urging residents to stay indoors and remain hydrated as hospitals report an increase in heat-related illnesses.

Impact on Switzerland

Switzerland, traditionally known for its moderate climate, is not immune. Zurich, Geneva, and Basel have all reported record-breaking temperatures exceeding 37°C. The Swiss Federal Office of Meteorology and Climatology confirmed that June 2025 is on track to become the hottest month on record. Authorities have implemented water conservation measures, opened cooling centers, and advised the public to avoid strenuous outdoor activities. The Swiss energy grid is under stress as air conditioning demand increases.

What happens next

Forecasts indicate that elevated temperatures could persist into July, heightening concerns about water shortages and wildfires. The Swiss government is collaborating with European neighbors to share data and devise unified responses. Long-term solutions under discussion include urban greening, improved infrastructure for heat resilience, and accelerated climate mitigation efforts. As the situation develops, experts stress the importance of both immediate adaptation and sustained action to curb global warming and protect public health.