I think 104 is the hottest I've ever seen here, although the humidity is worse here than the Mojave Desert.
We complain in Michigan when it hits 90.(ducking) :)
No ducking required...having spent a Fourth of July in the St. Cloud Minnesota area, when it hit the very high 90's, I can commiserate; sitting on the curb waiting for the parade was not a pleasant experience.....humidity sucks once you get to the upper 80's.
We have, given all, that "DRY HEAT" here. But get over 110 and it's head for the house time, and hope Gray Davis doesn't pull the electricity plug, because the A/C is going to be cranking.