Ok, I guess this is b/c in Montreal days pushing 90 are hot, but 100+ sounds insane to me. However, anything that hot here is so humid that your lungs feel like the may burst, and you feel like you're sweating even though its just the moisture in the air.

But I definately echo the other riders, early rides, hydration, shade. I aim for waterfront rides to benefit from the cool breezes. (Plus, winds make you a stronger cyclist!)