Yes, we are like to get the spin off winds and rain from the storm blowing up fast in the Gulf. And I had arranged to let your first two ducks free tomorrow on a private pond. Your original two can fly now and are in danger staying inside the screened porch if they fly into the screens.
View attachment 3950493View attachment 3950495
My own ducks come into the house and into my bathroom if we are near the eye of a storm. If we are under mandatory evacuation, I will take them in pet carriers to my son's house that is not in a mandatory evacuation zone. But the ducks have to stay in the pet carriers there as my son's own ducks are in his bath. That has not happened yet.
As for wild ducks and ducklings, they hunker down in vegetation. I worry that there is not much natural shrubbery around your ducks. There is really nothing you can do to help, just know that muscovy are resilient.