Hurricane Erin is a huge Category 4 storm and is expected to both grow larger and stronger today as it moves toward the west-northwest. The center of the storm is expected to remain offshore as it moves between the U.S. and Bermuda.

North Carolina expects coastal flooding from massive waves, tropical-storm-force winds and tidal and storm surges for much of the state shoreline, especially the Outer Banks, as well as life-threatening rip currents for most of the week, Stein said, adding, "No one should be in the ocean."

The Tropical Storm Watch is extended northward along the U.S. Atlantic coast, and now stretches from Duck to Chincoteague. A Tropical Storm Warning is in effect south of Duck, to Beaufort Inlet, including the Pamlico and Albemarle Sounds.