Not built for the heat: How do cities adapt to record temperatures?

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? ...