Joe,
By the time you figure the heat index with the percent of humidity, 110 plus humidity can be very high. It is like the wind chill index they use in the Winter. The actual temperature may be just -40 degrees but with the wind chill it is the same as -60 degrees or more. I was in Death Valley once when they said it was the same as 144 degrees. Even the scorpions wouldn't come out from under the rocks.
Ron