There are lots of strategies for staying cool!
[*]Wear lightweight, moisture-wicking clothing whenever possible. Target carries Champion brand clothes in their workout clothing area, and REI has lots of options in moisture-wicking items.
[*]Drink lots of water - much more than you would at home. It's easy to get dehydrated.
[*]Use misting fans - you can buy them at WDW or get them somewhere like
Walmart.
[*]Arrive at the parks well before "rope drop" (i.e. when the parks open). I'd aim for an arrival time of 45 to 60 minutes before they open. It's much cooler in the morning, plus the lines are shorter earlier in the day.
[*]Try getting Frogg Toggs brand "chilly pads" - you wet them with water and wear them around your neck to stay cool.
[*]Bring some sort of wet wipes to refresh your skin if you get hot and sweaty. You can buy travel-size packs of Kleenex brand "Splash and Go" wipes at Target; they're very refreshing.
[*]Spend time in air-conditioned attractions. restaurants and shops throughout the day.
[*]Wear a visor or a lightweight hat to keep the sun off of your face, and use lots of sunscreen.
I have lived in Florida all my life and definitely agree with this list! The heat will be bad so hydrate, and use misters or chilly towels! Get there early, take the afternoon as your time to go inside for a table service lunch or an A/C movie or show, or just slowly strolling through the shops. In the evening it becomes much more bearable again. Listen to these tips for the heat, and just don't panic. Try to relax and enjoy everything around you- if lines or things seem too crazy, skip it and find some attractions that are not headliners to enjoy!
Here are some things that are low key or enjoyable at each park you are going to:
MK- Mickeys Philharmagic, Carousel of Progress, Tomorrowland Transit Authority, Monsters Inc laugh floor, liberty Belle riverboat, Tom Sawyers Island, Swiss Family Robinson Tree house
Epcot- Living with the Land, Imagination, Captain Eo, Innoventions, Ellen's Energy Adventure, wandering around World Showcase
HS- Muppets 3-d, great movie ride, animation building, one mans dream, little mermaid show