Use Weatherstripping: Put in the weatherstripping tightly around door frames and together window sashes to make a seal. I are now living in North East Florida over the Intracoastal Waterway. We flooded five years back during Hurricane Irma. Every year during mid-summer we get started observing the Hurricane Tracker app https://richards-peters.federatedjournals.com/a-great-door-stop-for-angled-ceiling-is