FWIW that's a almost local stage for us, and they are heading right an area which is covered by our current Canicule (heatwave) warning..
vigilance.meteofrance.fr/fr/canicule
Some of the teams end up in fairly basic hotels for night stops and restdays so hopefully the team management has brought plenty of mobile A/C units for night time use.
Fingers crossed it'll be a few degrees lower, in the mid-thirties for Tuesday and Wednesday's mountain stage...still going to be darned hot though..