Hurricane Erin is strengthening again and forecasters say it could re-intensify into a major hurricane.

The storm is creeping toward the mid-Atlantic coast and churning up menacing waves that have closed beaches from the Carolinas to New York City.

It’s expected to peak over the next 48 hours. Erin is unlikely to make landfall along the East Coast before turning farther out to sea.

Authorities are warning that its large swells will cut off roads on North Carolina’s Outer Banks and whip up life-threatening rip currents from Florida to New England.

The National Hurricane Center is watching two more tropical waves to the east of Erin.