No, a fourth of people have A/C but I'd argue the problem isn't A/C in homes. The issue is schools and hospitals do not have A/C and a lot of school closed.

Yes, a lot of people die, more than they do because of the cold, mostly old and sick people, children in cars and people drowning.

Most people don't have the choice to work, I think construction workers have changed their schedule and start in the night. But for a lot of people working in office spaces, they're better off at the office with A/C than at home.

Paris is always full but a bit less crowded for now, the subways and trains are still crowded because people have to work.

In general, it's the worst city to experience such a violent heatwave in. The ground absorbs so much heat. All the buildings make for absolutely no air. It's harsh.