The low today in Phoenix is 90*. The low. The high was 111*. So yes I use a/c in my house between 81-88* depending on if we are home or not.

A car sitting in the sun during the day can reach temperatures over 150*. Driving 60 mph in 111* with all windows down will drop the temperature by about...what...15 degrees but the wind is super heated anyway as the asphalt at ground level is over 120*. Then I'd also have to worry about sunburning my skin b/c my tinted windows also provide sun protection.

So, I take slight offense at being told that, "If you think you can't live without A/C then I don't quite understand what you are doing on a survival forum."

My 5 month old daughter certainly appreciates it as does my boy and DW.

I have zero problem, zero problem going for 4 hour cycling workouts or running 10 miles in this kind of weather but I'll use my a/c when I can thank you very much.

And BTW, the advent of a/c has radically changed the way in which homes are built today. Before a/c houses and community buildings were built with different window and room set ups that pushed hot air out, such as taller windows with vents at the top for hot air to escape.