Hint--if your power goes out, turn off the main circuit breaker and unplug appliances.
If your ceiling starts to leak badly, take a little saw or screwdriver and make holes around the leak. Helps the water drain out instead of soaking all over. Of course, it'll still soak but maybe it won't be so bad and it might help keep the entire ceiling from falling in.
If you have water damage afterward, it's important to both get hold of your insurance company and call a water removal company such as ServiceMaster or ServicePro. There's lots of these companies out there. Our insurance company sent one but you can also call one yourself.
Remember if you have roof damage, call FEMA and register. Ask to be put on the Army Corp of Engineers list. They come out for free and put tarps on the house. Of course, you can put your own tarp on but their tarps last. And roofing materials might be in short supply after the storm. Took us 5 months to get a new roof and others in our area waited longer. Oh, yeah, call a roofer immediately because they'll have waiting lists. They'll put tarps on the house for a fee if you can't do it yourself--I think we paid $250 back in 2004. Then we had the Army Corp of Engineers do it too but it takes a couple/few weeks for them to get there. They did our entire neighborhood, free. In the meantime, tho, get a tarp somehow and do it yourself or
your insurance company will crab if you later have more damage and didn't get a temp repair right away.
If you have damage and have to call insurance co and they lowball the amt of damage, fight it and ask for another adjuster. All adjusters are different in their opinions.
Been thru three direct hits and it's sure not fun.