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Swiss Re, a Zurich-based global reinsurance group, has released findings via its Swiss Re Institute showing that increasing temperatures are placing growing pressure on Switzerland’s established ability to manage natural hazards.
The company notes that Switzerland already benefits from strong protection against events such as floods and storms, supported by prevention strategies, robust construction standards, forward planning and widespread insurance coverage, yet rising heat is now adding a further layer of risk.
Swiss Re Institute reports that Switzerland is warming at more than double the global average, according to figures from the Swiss Academy of Sciences. The company explains that extreme heat does not operate in isolation but intensifies existing risks, influencing public health, farming, water availability, energy demand and critical infrastructure, while also contributing indirectly to conditions that can worsen other hazards, including flooding.
As part of its response, Swiss Re is introducing its Resilient Switzerland initiative, designed to improve shared understanding of risk, encourage preventative action and support mechanisms for distributing losses. Within this framework, Swiss Re will hold the first Schweizer Resilienz-Tag on 26 June 2026 at its Centre for Global Dialogue in Rüschlikon, convening government, scientific, business and civil society stakeholders to consider practical responses to heat impacts at a local level.
Gianfranco Lot, Swiss Re’s Country President for Switzerland, commented: “Switzerland is well prepared for floods and storms. But heat is a different kind of risk: less visible, harder to insure, and able to amplify risks the country already manages well. For heat, resilience means shade on the street, cool rooms in care facilities, safer hours for outdoor work and risk sharing where losses cannot be prevented.”
Swiss Re data indicate that Switzerland currently experiences around 10 to 15 days each year with temperatures reaching at least 30°C, compared with roughly five such days in 1990. Swiss Re also highlights that urban areas are particularly exposed, as cities retain heat more effectively than surrounding countryside, often remaining up to 6°C warmer. Warm nights, including tropical nights where temperatures stay above 20°C, further limit cooling and recovery.
The company also points to health-related consequences identified in its analysis, including higher risks of heatstroke, dehydration, cardiovascular stress and worsening respiratory conditions, especially among older people and those with underlying illnesses. Swiss Re references the 2003 European heatwave, which it notes increased mortality in Switzerland by around 1.5% that year, demonstrating how quickly elevated temperatures can affect public health systems.
Swiss Re further explains that heat can alter the behaviour of other natural hazards. Flooding remains the country’s largest insured natural catastrophe exposure, representing about 60% of average annual insured loss estimates when normalised, according to Swiss Re Institute data. After prolonged heat, dry ground absorbs less rainfall, increasing the likelihood of rapid surface water flooding during heavy storms.
At the same time, drought conditions can weaken agricultural resilience to hail, while warming temperatures and melting permafrost can destabilise mountain slopes. Swiss Re points to the Blatten rock and ice avalanche in May 2025, which resulted in insured losses of CHF 320 million, as an example of how longer-term climate shifts are already influencing severe event outcomes.
Swiss Re notes that many effective responses must occur locally. While Switzerland already uses heat warning systems, urban temperature monitoring and targeted protection for vulnerable groups, Swiss Re highlights that much of the building stock, including schools, homes and healthcare facilities, was designed for cooler conditions and now requires adaptation.
Across the country, Swiss Re observes that practical measures are emerging, including redesigned urban spaces, increased shading and water features, changes in land-use planning, reduced surface sealing and more heat-conscious development approaches.
Through the Schweizer Resilienz-Tag, Swiss Re aims to examine how such measures, alongside enabling conditions, can strengthen preparedness for rising temperatures, bringing together cantonal and federal authorities, municipalities, researchers, businesses, civil society and the insurance sector to improve coordination and risk awareness.
Swiss Re concludes through its Swiss Re Institute that maintaining Switzerland’s resilience will require coordinated, multi-level action combining prevention, adaptation and risk-sharing, building on existing strengths in managing natural hazards while addressing the growing influence of heat.
The post Swiss Re warns of rising heat stress on Switzerland’s climate resilience appeared first on ReinsuranceNe.ws.
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