Just got back from VA but put I can answer this question since it was 95+ for 3 days and of course got heavy rain for half a day, I'm going to bed now since it's late but I'll post my insight on this even though it was in other theme parks
OK so how did I manage the heat & whats a trip without some heavy rain
Day1- 95D+ - Kings Dominion, although no where near the scale of WDW, it is basically 3 parks in one, 1st thing we did was Dinosaur land has a extra $5 charge but well worth it

, has a setup like AK where you walk paths and yes even though its all shaded it was still hot but bareible, next we hit the lazy river & wave pool in the water park for a couple hours that is included with admission, you could spend the day there it's actually pretty big

, now all refreshed went to lunch and hit the rest of the park, we did catch a inside show that was nothing to write home about but it was nice and cool

, as for lines I can say there were none I don't know if it was because of the heat or that it was the middle of the week

Anyway day 1 of the heat was a success with no complaints
Day 2- 95D+ - Busch Gardens, we started off the day at their water park, Water Country USA as soon as it opened, headed for the lazy river, this has to be the best lazy river ever

, you don't use a tube, you wear a life jacket and you can float as the current pulls you, I could stay on this all day

, hit other water rides and the wave pool and about 1pm we went back to the hotel to change and headed to Busch Gardens, 1st thing we did was eat lunch, caught 2 inside shows, now the shows here are really good, if you ever go here and don't see them you are missing out

, then started to hit the rides, walked right on everything

The only thing I was disappointed in was the new coaster was having trouble and was closed by the time we got to it

, had dinner then did more rides, always had our cup full of soda or iced drink, once again we beat the heat with no complaints
Day 3- 97D+ - 1st part of the day was a repeat of Day 2, but this time when we left the water park the sky was getting really dark

, we got changed at the hotel and headed to BG, when we got there it looked like it was going to rain any minutes we headed to the furthest part of the park for lunch that also has a show, we were about 100ft from it when the sky opened up

we got lunch and the show started about 20mins later, I was thinking this was going to be like a summer storm at WDW maybe last 1/2 hour tops and clear up, nope wrong

after the show the rain was light so we moved out made it half way around the park before it started coming down heavy again, we made it to a inside ride, when it slowed down we moved again and the rain stopped so we went on the rides in the area, then it started again and we saw a inside show, when it stopped again we caught the train to a different section of the park and hit the ride that was open there, now it was a bit of a walk to the next section, luckily the rain held off till we got there, we hit a inside ride while the sky opened up again, now we are trapped at the exit, it's pouring and we rate almost at the furthest part of the park again and have done everything in the park that was open, so we went shop hopping heading to exit, grabbed dinner after we were done eating the rain stopped still thunder going on, but it was time to leave, we made it out of the park and to the car without getting soaked

We were back at the hotel by 8pm
IMO I would much rather deal with the heat then the rain

, you can escape the heat, but the rain once you get wet, everywhere you go inside has the A/C on and now your freezing, although in WDW it's a lot easier to manage the rain since everything is mostly inside and things are closer together
