I'm sort of glad I'm not around to experience it haha! I'm in Hong Kong right now for the summer...which is hotter, and more humid, but at least A/C is everywhere.
But it's so not worth it to get A/C for the 2 weeks max in a year that Vancouver gets excessively hot...I'm sure if I was melting away there right now, though, I would think otherwise!!
Stick a bra in the freezer, sleep in the basement with the fan on as you spray ice water from a fine misting bottle in your face, preferably naked. Ah, summer...don't worry, the rain will be back before ya know it.