"For those that are going to be in Portugal it might be wise to speak to your doctor about such high temperatures and how to cope with them or if you should cancel your travel!
This is funny!
Well, if someone choosed to book a room/apartment/whatever without AC, just go out to the beach, and take a blanket with you. This is all very interesting, but the North Wind never quits... The difference between temperature and "what feels like" is, at least in Porto, a HUGE difference. Although, of course, AC is always welcome.
"aulopone" don't be afraid to come to Portugal, and don't cancell your trip (unless your doctor says it's absolutely necessary), I can promise you You will have the best experience you can imagine eating our food, meeting our people, and visiting all we have to be visited (when I say we, it's because I'm portuguese, living in Portugal, still alive besides the hot weather).
Happy travels for you too!!! Don't worry so much, just travel!