Ware, in my part of the world, temps averaging around 100 are pretty much par for every day from the middle of May until the middle of September. You just kind of get used to it. Nowadays, the only temps that really eat my lunch is when it's over 110. Pretty much anything else, I can combat the heat with a combination of proper clothing and plenty of ice water (I freeze those big gallon gatorade bottles at night and then spend much of the following day drinking them as they melt and re-filling them from the hose at the barn).
I know with the heat index and all that, a humid heat actually feels hotter, but I often wonder if a dry heat isn't more dangerous. Because we're so dry here, with relative humidities maybe reaching 25% on a humid day, you just can't get any cooling from what you do sweat because it all evaporates the instant that it seeps out through your pores. Even breathing in weather like that is agony because your nasal cavities dry out to the point of nosebleeds and it makes your lungs feel like little shriveled up raisins. It only takes about 15-20 minutes here to be pretty severely dehydrated.