we went "home" also during the last week of September last year. Boy were we in for a reality check, being from the north. It was extremely hot but we managed just fine. We had no problem getting on any of the rides, especially the water ones like Splash Mountain (my favorite), Kali River Rapids, etc. Just pace yourself and you should be fine. Don't try to overdo it buy staying in the parks all day and get overheated. We returned to our resort during the middle of the day to take a nap or swim in the pools. Use common sense and drink lots of liquids, especially water- that is the best for you. We are going back this year from 9/19-9/26, are we crazy or what?? Hey- free dining can't be missed to save a ton of money. Good Luck!!!! I really liked late at night with hanging out by the pool with a drink in hand- that was awesome!!!!!