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 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 storm is bringing dangerous conditions to parts of the coast on Wednesday, but will then turn away from the United States.

Hurricane Erin is marching north and is set to bring life-threatening rip currents, destructive waves, coastal flooding and possibly beach erosion to much of the East Coast. The conditions will last through Thursday before improving later on Friday and into Saturday.

A tropical storm warning has been issued for North Carolina as Hurricane Erin churns up the east coast of the U.S. as a Category 2 storm.