The world is burning, but who notices?

Heat waves and forest fires are just a foretaste of the global warming that’s already, perhaps irreversibly, upon us. But France is in the vanguard of change.

When the Tour de France bicycle race rolled into the ancient walled city of Carcassonne to wind up its 15th stage on Sunday, the temperature hovered just under 100 degrees. Tour organizers allowed the riders extra drinks en route, but the 202.5-kilometer course was brutal.

On Monday and Tuesday, triple digit temperatures of 103 and 104 degrees respective…