I'll be down at that time too, just in time for Jeanne to come through. I got tickets for Disney Quest since it's indoors, I think it will be good on Sunday when the big storm is suppose to hit...LET'S THINK SUNSHINE for the trip!
I would suggest visiting MGM. Most of the attractions are indoors. So you can still get the park experience without getting so wet. They have plenty of attractions the kids will like and cool places to eat as well.