Hurricane Erin is now a Category 4 storm, rapidly intensifying overnight into early Saturday morning as it moves closer to the U.S. East Coast with sustained winds up to 155 mph.

Hurricane Erin became a catastrophic Category 5 storm before noon on Saturday, Aug. 16, according to the latest advisory from the National Hurricane Center.

Dangerous surf and rip currents are expected to affect the U.S. East Coast next week, with waves reaching up to 15 feet (5 meters) along parts of the North Carolina coast that could cause beach erosi...