One of the best sources of information about protecting a house from flooding is the Floods and Hurricanes site administered by the Louisiana Cooperative Extension Service.
From South Bryan, the main evacuation route follows GA highway 144 westward through Fort Stewart. Keep a kit with a battery-powered radio, flashlight, bottles water, sleeping bags, canned food and a can opener on hand. GA Public Broadcasting carries emergency updates, and the local GPB Radio station is at 91.1 on the FM dial.