The National Hurricane Center says Hermine is likely to strengthen into a Category 1 hurricane when it lands in Florida on Thursday night or early Friday.
A storm that would be named Bonnie threatens holiday cookouts and celebrations along the U.S. coast from North Carolina to Georgia over the Memorial Day weekend.
High water levels are still posing a threat in South Carolina, and the situation is expected to worsen, according to catastrophe modeling firm AIR Worldwide.