Hurricane Isaac contributed to a moist air mass that brought torrential rainfall and street flooding Tuesday in Charleston, South Carolina, officials said. By evening, between 4 and 8 inches had fallen across the low-lying metropolitan area. "We were stranded and had to be rescued ourselves," said Charleston County spokeswoman Tracey Amick. "Our car had water coming through the doors. It’s ridiculous right now. There are trash cans floating down the street, cars stuck, people trying to get through these flooded streets on bicycles."