Yeah...here in Chicago the first 1 or 2 races in our series might have and have had hot weather but it really only affects the big guns. We're tailgunning for 30 minutes....I can do a mid-summer crit without water for 30 min.
Personally I like the saying that on every lap in cyclocross you have 100 things you have to do and on your best day you might get 50 of them right....I'd hate to add 'drinking from a bottle' to that list.