You get used to it. We always head north for ten days in August and it's a welcome relief; but you can't beat our weather in October/November and no June Gloom!
You're right. Next year I'm going to shut down my business for three weeks from 7/25 to 8/15 and go cool off in the mountains. The AZ weather is not that uncomfortable because the humidity is so low. I lived in Atlanta for a couple of years and that summer weather is less comfortable on hot days. The problem with AZ summers is the heat just never lets up, not even for two days. I agree that everyone needs to take off for at least 10 days up in the mountains. But overall, I love this state and people have been really friendly to us even though we're from that "C-word" place. But we're Pubbies so it's OK...lol.