don't forget to replace your salt... you'll be sweating heavily so that's an issue too... I think most of the elctrolyte drinks help with it... and after listening to the advice of my brother I have found that Ecaps are helpful... small, so they're easy to get in even if you've drank so much you're full... which happens to me on century rides...

I do NOT do well in the heat, at all... it's a challenge for me every year. we stay over 105 for a couple weeks every summer... I just HAVE to ride slower and not push...