S.C. Code Ann. 25-9-120
Liability: Providing Shelter
A property-owning individual who, voluntarily and without compensation, allows others to use their property for shelter during an emergency or training will not be held legally responsible for injury, death, or damage to property that results from use of the property.
Immunity of persons owning property used for civil defense
No person owning or controlling property who voluntarily and without compensation permits such property to be used as a public shelter for civil defense purposes shall be civilly liable for the injury or death of any person who may be injured or killed on such premises, or for the loss of or damage to the property of any person on such premises, during any time such premises are actually being used as a public shelter.