Hurricane ready the parks I would think is getting anything that is not nailed down to interior buildings which is all the trash cans, tables chairs banners , umbrellas, portable lighting etc, etc, sandbag the front doors to hopefully prevent flooding into the carpeted and flooring areas of buildings and so forth. This takes time and lots of manpower. All of these could be flying missiles if left outside.
This isn't WDW's first rodeo with a hurricane.