It's not even Bastille Day yet, and France is already in the grip of its third heatwave of the season. Hospitals are under strain, wildfires are spreading, riverbeds are running dry, work and study are being disrupted—and there's even a shortage of ice. Many of you reacted strongly to our recent discussion on whether air conditioning is the answer. We'll briefly revisit that debate, but also look at the bigger picture: why is France still so unprepared for extreme heat?

We'll ask why new construction has so often failed to deliver on the promise of homes that stay warmer in winter and cooler in summer—and what solutions exist for the vast majority who can't simply build a new house from scratch. Can Paris preserve the charm of its iconic zinc rooftops without turning top-floor apartments into ovens? How do we help those who can't afford costly heat pumps or extensive insulation?

As climate change deepens inequality, competition is also intensifying for the water needed to grow crops, cool nuclear power plants, and restore depleted soils. At a time when the political mood favors rolling back regulations, where should policymakers draw the line?

Produced by François Picard, Rebecca Gnignati, Guillaume Gougeon and Piera Rocco