Taco Girl thats great info.
I've been here for quite a few of these events and have a couple of things to add.
The Banks have a different evacuation policy than everyone else and bail early. Belize Bank closed up one year earlier than most people could get some cash out. When customers tried to get money out in other parts of the country from the Belize Banks they where told they couldn't because records of there accounts could not be accessed due to the San Pedro branch closing.Moral of this is get cash out now.
The second thing is Big Rubber Boots, those Big black boots you see around are invaluable if walking through water and muck for days.Dry healthy feet are good to keep you from getting all kinds of health problems.