Disney has it's methods of keeping the guests entertained AND safe during hurricanes, so if you have the threat of one, or even have one on it's way, I wouldn't worry too much.
Well, within reason of course. I'm from New Orleans, so I know what it's like to have to deal with them but let's just pray this season doesn't produce tragedies like last season.
Just go and enjoy your trip as planned, you never know what the season will bring and when, so just keep an eye out.