From my understanding, metal roofs will withstand hurricane winds better than other roofs, as long as the structure is sound. There are a lot of people in my area that are actually switching over to metal. Although, I don't know what kind of metal and if tin would hold up as well as what they are using for houses.
I think my ducks would be ecstatic in a hurricane! They don't care if it's thundering and lightening, they are always out playing in the worst storms...
You could probably come up with a battery backup for the brooder. And if you have to take them with you, as long as there's several of them, they should be able to keep each other warm for a little while...
Well hopefully we won't have any storms that would force us to swim, anytime soon! And hopefully we can come up with a plan that will protect us and the poultry...

im glad you responded! Im playing alot about it because it is a Very Deep Seated fear, and id love to help u keep this up, so we can get as many ideas as possible! I would guess that the new metal roofs your seeing are aluminum, which would be Alot more durable than this tin. A plywood and shingle roof would be better in MY situation

i consulted my Daddy, cuz u got my mind turnin! Im worried about the wind taking my coop roof flying, and if it was built with shingles, and the shingles were liquid nailed at the "loose" end... I now know that it would be better than this tin situation.
On the water rising: i have a tiny river close by and the water would have to be above that 15 ft bank by 4 ft before we had a Standing problem. Flash flooding is my concern with these property levels like this. Over the next yr i intend to make a much needed higher coop floor. Regular thunderstorms make it slop and i have to get em off the ground. We have started by building up cut grass in a lasagna style deep bedding system.
Yup, the ducks would totally call it play time, thats why i joked about it.

really the problem would be predators for them, as soon as the storm died a lil things would be coming out to eat :O The only cool chances they have to play right now are after dark and while its rainin, and they take the latter very seriously!
Battery operated packs would work, and thats the plan w the fish tank... Why didnt i think of that?!
Again, thank you for your insight in my situation! Hopefully we Can All have the best plans in place, and we wont have a bad enough storm to need to swim!
I will add, in case of a Mandatory evac... I have 5(or so?) Kennels that could transport poultry to safty, but only a small four door car

also my flock is 4 silk bantam all diff breeds, 6 assorted layers, 3 quail, 7 Cajuga ducks and 3 B Red turkeys... i would need help in a bad way, and theres someone i need to go ask for help, as part of the plan making. Moving our flock would be a nightmare.