Dry heat, humidity, it doesn't matter once it passes 100. Of course, I'm like Stars, anything over 80 is too hot. Our monsoons are brutal as the temps are high and so is the humidity. The temps can sometimes drop significantly right before, during, and right after the storm. It can go from over 100 degrees right down to 70 in a matter of minutes.

At our house we have an evaporative cooler, not air conditioning and although it hasn't been too humid, it's not as effective in this excessive heat. I've been laying low this week.

Also, I think humid heat is far worse as when you sweat, it sticks to you and doesn't evaporate as quickly.