It’s a hot day at the height of summer. The sun is beating down on you and your family. Your lawn is already thoroughly scorched from a full summer of this kind of heat. Thankfully, you have your trusty home air conditioning unit to keep you all cool—until that, too, finally gives in to the heat outside. Making it even worse is the fact that it’s the late afternoon, when the sun is at its peak. You don’t want to wait until tomorrow morning or—if you’re unfortunate enough to have this happen on a Friday—next week to fix your AC.