It hasn't been that bad. Sure, the last 2 or 3 weeks have been hot and dry in southern Ontario (can't speak for anywhere else in Canada, although I did see someone on Facebook lamenting their 16C temp and rain LOL). But the rest of the spring and summer prior has been pretty cool and wet.
I don't know about the humidex (or real feel temp, or whatever other terms used to describe it), but it didn't feel a bit over 35C today LOL.