Depends on how close they are to the ocean and how close to sea level.
Thorough analysis for Myrtle Beach, which is one hour, so, just said about 6 inches of rain, 5 to 6 feet storm surge and 45 to 55 mph winds.
Ocean Isle Beach is about one hour north, and stronger affects of the hurricane are going to be south of Myrtle Beach, but TBD. Prayers up.
Prayers for you, too, and all of coastal S. Carolina.
This bad boy, Ian, is not done yet.
Hide from wind. Run from water. Best wishes for safe passage through the storm.