People stand on the safety of a bridge as homes sit in floodwater in a subdivision west of the Ashley river in Charleston, S.C., Monday.

Helicopters fly over the Congaree River, swollen with floodwaters, near the Gervais Street bridge in West Columbia, S.C., Sunday. Hundreds were rescued from fast-moving floodwaters Sunday in South Carolina as days of driving rain hit a dangerous crescendo that buckled buildings and roads, closed a major East Coast interstate route and threatened the drinking water supply for the capital city.

A man paddles a kayak down a flooded street in Columbia, S.C., on Sunday. The rainstorm drenching the U.S. East Coast brought more misery Sunday to South Carolina, cutting power to thousands, forcing hundreds of water rescues and closing many roads because of floodwaters.

Cars make their way down a flooded street in Atlantic City on Saturday.

The Congaree River, swollen with floodwaters, flows under the Gervais Street bridge in Columbia, S.C., on Sunday.

Jordan Bennett, of Rock Hill, S.C., paddles down a flooded a street in Columbia, S.C., on Sunday.

Members of Norfolk Fire-Rescue pull a man from his car after he became stranded in floodwaters Sunday. The Associated Press

A car is submerged in floodwaters in Florence, S.C., Sunday after steady rain left many roads impassable. The Associated Press

Neighbors watch employees with the city of Isle of Palms remove a live oak that toppled after heavy rain in South Carolina on Sunday.