Though Hurricane Erin is not forecast to make landfall on the U.S., the storm’s rapid intensification has prompted increased measures in North Carolina.

Though Hurricane Erin will not make landfall in the U.S., here's why a Tropical Storm Watch has been issued for parts of North Carolina.

The Outer Banks in North Carolina are under evacuation warning as Hurricane Erin whips up potentially 20-foot high waves and flooding along the east coast.