That;s an advantage of high heat indicess, if one can imagine heat indices of 105+ having any advantage. Heat indices are indicative of high humidity levels which suppress evaporation rates. Without that humidity the evaporation rates would skyrocket, as noted by some places in Texas that are reporting evaporation rates of about an inch/day. THAT, my friends, is a lot of water.
"Everybody is ignorant, only on different subjects." - Will Rogers