Hurricane Erin has weakened to a Category 1 storm after lashing North Carolina's Outer Banks with rough waves and coastal flooding, and bringing a threat of dangerous waves and potentially deadly rip currents to the East Coast.

Forecasters warned the storm, now a post-tropical cyclone, could continue to cause dangerous conditions on East Coast beaches for a few days.

Increased surf and dangerous rip currents are expected to continue along the eastern seaboard as Hurricane Erin moves into the North Atlantic.