Yes, you can screw the plywood over the big windows. Unfortunately, all they had left was 3/4 in. plywood which is heavy as heck.
I'm about 12 miles inland. Our danger is from falling trees and tornado activity. My family (incl kitty) won't be here if Mobile takes a direct hit.
J- I had no idea you were that close to the water. Girl, get the heck outta there. And hugs to kitty.