France’s recent heatwave is highlighting significant deficiencies in the nation’s preparation for the impacts of a changing climate. Climate scientist François Gemenne argues the issue receives attention only during extreme weather events, representing a reactive rather than proactive approach. A key concern is the country’s aging building stock, which lacks adequate insulation and contributes to indoor heat buildup. Gemenne advocates for a large-scale building renovation program to improve energy efficiency and resilience. He also suggests a reevaluation of France’s traditionally limited use of air conditioning, acknowledging its potential role in protecting vulnerable populations during increasingly frequent heatwaves. The situation underscores a need for long-term, systemic changes to address climate adaptation and mitigation.