More than 33 million Americans were under coastal flood advisories on Aug 20 as Hurricane Erin head north toward the U.S. mainland.

Hurricane Erin has battered North Carolina’s Outer Banks with strong winds and waves that flooded part of the main highway and surged under beachfront homes

Hurricane Erin will make its closest approach to the United States on Wednesday and Thursday, bringing dangerous surf and/or coastal flooding to a dozen states.

The National Weather Service released an updated coastal flood watch at 6:26 a.m. on Wednesday valid from Thursday 5 p.m. until Saturday 2 a.m. for Ocean, Atlantic and Burlington counties.

The NWS Wakefield VA released a coastal flood warning at 2:54 p.m. on Wednesday valid from Thursday 7 a.m. until Friday 2 p.m. for Eastern Currituck.

At 4:15 p.m. on Wednesday, the National Weather Service issued a coastal flood advisory valid from Thursday 11 p.m. until Saturday 5 a.m. for Lower Bucks as well as Delaware and Philadelphia counties.