Record Heatwaves Hit Major Cities in 2025: Impact and Outlook

Background

In recent years, global temperatures have consistently set new records, raising concerns among scientists, policymakers, and communities. Urban areas are particularly vulnerable to extreme temperatures due to the heat island effect, where concrete and infrastructure absorb and radiate heat. Climate change, combined with rapid urbanization, has intensified the frequency and severity of heatwaves worldwide.

What is happening now

By mid-2025, multiple major cities across Europe, North America, Asia, and the Middle East are experiencing unprecedented heatwaves. Temperatures in some cities, such as Rome, Paris, and New Delhi, have surpassed previous records by 2 to 4 degrees Celsius. Authorities report increased hospital admissions for heat-related illnesses, disruptions to transportation networks, water shortages, and power grid stress. Several local governments have opened cooling centers and issued public health advisories as the situation evolves.

Impact on Switzerland

Switzerland, while known for its cooler Alpine climate, has not been immune to the effects of this year’s heatwave. Urban centers like Geneva, Zurich, and Basel have reported higher-than-normal temperatures, pushing local services to adapt. Swiss hospitals are monitoring vulnerable populations closely, and cities have implemented temporary cooling zones in public spaces. The ongoing heat further challenges Switzerland’s energy supply, particularly as demand for air conditioning rises and alpine glacial melt impacts river flows.

What happens next

Experts predict that heatwave events will likely become more frequent and severe as climate change progresses. Swiss authorities are investing in urban greening projects, adapting infrastructure, and reviewing emergency response plans to manage long-term risks. Continued international cooperation and local innovation are crucial to mitigate the impact on health, infrastructure, and the environment. Swiss residents are being encouraged to stay informed, reduce energy use during peak times, and look out for vulnerable community members. The coming weeks will reveal how cities globally adapt to this new climate reality.