Despite changes in intensity, Erin’s size will drive dangerous surf and massive seas along much of the United States East Coast, as well as Atlantic Canada and Bermuda waters.

Although the weather center was confident Erin would not make direct landfall in the United States, authorities have warned that water conditions along the East Coast remain dangerous. Officials on a few islands along North Carolina’s Outer Banks issued evacuation orders and warned that some roads could be swamped by waves of 15 feet.