About 6,000 to 8,000 people in Georgetown County, S.C., were alerted to be prepared to evacuate before a "record event" of up to 10 feet of flooding expected from heavy rains dumped by Florence, county spokeswoman Jackie Broach-Akers said. She said flooding is expected to begin Tuesday near parts of the Pee Dee and Waccamaw rivers and that people in potential flood zones should plan to leave their homes Monday.