LOL, hey man, come down to Oklahoma. Mix 100+ temps with humidity and experience the human definition of miserable.
I visited DC and NYC a couple years ago. I was looking forward to it because your (typical) cool temps compared to here. Those years both places set record HEAT temps. Ugh. Had to relocate hotels in DC because they didn't have true a/c units and their glorified water coolers couldn't keep up with the heat. The whole city was beside itself.
Anyhow, no wise words on what to use. I use a pillow. It gets hot too.