Regardless of the reason, here are some tips for "beating the heat" at WDW:
Take Advantage of Air-Conditioned Queues
Battery-Operated Spritzer Fans
It's a water bottle clip. The Mickey head stretches perfectly over the neck of a water bottle, allowing you to clip the carabiner to your belt loop. Now granted, you may be able to find one elsewhere without the Mickey ears ... but it won't be nearly so cute. :) These are available at many of the shops around Disney, and they really last! I think we've used this one on 7 or 8 trips so far! Oh, and if you're looking to refill your water bottle, we have it on good authority from Disney Cast Members that the coldest water fountain in the Magic Kingdom is by the First Aid Station next to the Crystal Palace Restaurant.