Miami, September 5 (RHC)-- As Hurricane Dorian continues moving up the southeastern U.S. coast, South Carolina was feeling its effects Thursday morning.  The storm had lost some of its strength after hitting the Bahamas.  But it intensified again into a Category 3 storm Wednesday night, with maximum sustained winds of 115 mph, according to the National Hurricane Center, based in Miami.

The city of Charleston, South Carolina was already experiencing flooding Thursday morning, Charleston County Emergency Management told reporters.  Early Thursday morning, Dorian was 80 miles south-southeast of the city, the National Hurricane Center said in a 5 a.m. advisory.

Dorian is expected to continue moving closer to the coast of South Carolina throughout the day and then along or over the coast of North Carolina Thursday night into Friday.  More than one million people in parts of South Carolina and North Carolina are under mandatory evacuation orders. 

The South Carolina cities of Charleston, North Charleston and Mount Pleasant are under a flash flood warning until 10:15 a.m. ET, the National Weather Service in Charleston said Thursday morning.