Extreme heatwaves are making many homes in France uninhabitable, particularly those located under roofs. Residents are experiencing dangerously high temperatures, reaching 40°C (104°F) in some apartments. Faced with these conditions, tenants are forming collectives to demand action from landlords, neighbors, and government authorities. The situation highlights concerns about building insulation and the impact of climate change on urban living. Residents fear escalating tensions and potential legal action if conditions do not improve. This growing issue underscores the need for improved housing standards and adaptation measures to protect vulnerable populations during increasingly frequent heatwaves. The collectives aim to raise awareness and advocate for solutions to mitigate the effects of extreme heat on housing.