Heat problems

Do computers need to be kept cool? I have them in a room that keeps them at 69f. Without the AC the room get to over 95f and shuts down the power. I have 15 big Dell Servers in this room along with the phone pbx. The Director of Maintenance says computers don’t care how hot they are. I dissagree with him. I’m looking for words of wisdom or articles to show him
Many thanks

Gus