Here in S. Florida where we get hurricanes more often than you do, this is my advice - do NOT leave any windows open! In fact, you need to board them up - plywood should work well. If you leave air gaps or windows open, the roof might just leave!
Also, I'd crate my chickens and bring them indoors until the hurricane is past. They won't know how to keep safe in high winds.
Our last hurricane was a doozy - many hours of terrible winds, rain, some tornadoes. Snapped many trees in half - when we went out afterwards, and looked around - oh my gosh - the trees were all naked of leaves, and the leaves were as if they'd been through a blender. You could not find a whole leaf in my entire 1 acre property! The stack of brush we set out to the curb in the next few days would have filled a tractor-trailer. Thank God my house was strong, and no trees fell on the cars or damaged anything else except broke a section of wood fence. Learn about what to do in hurricanes, and then follow that advice! And protect your animals inside! (May God send angels to keep the winds from harming you)