It's going to be hotter than the surface of the sun, it's going to rain every day at some point. The rain might be a quick afternoon shower that will last about 15 minutes to a monsoon to a light rain all day but it will rain. After it rains, it will be like walking on the surface of the sun through a swamp. If a hurricane does hit the coast, the impact on Disney will be fairly light. It will be windy, it will rain and they might close down the parks for one day. If they do, they take very good care of you in the resorts. Take rain gear, wear shoes that can get wet, take a water bottle - you can get free water in every QS location in every park, splash in the puddles and have fun. As for the splash in the puddles part, MK is pretty bad about flooding, I've sloshed through water well above my ankles. As long as you are prepared with rain gear every day and know it's going to be hotter than you can imagine, you will be fine. I'm from Georgia and even for me, it's hot. I go often in August but I always take a mid-afternoon break in my room then head out to a different park after the break.