The National Weather Service said that Hurricane Michael will bring life-threatening storm surge, hurricane force winds, and heavy rainfall along the northeastern Gulf Coast.
Donald Trump traveled to North and South Carolina, which were deluged last week by a storm that killed at least 36 people in the region.
The Marines, the Coast Guard, civilian crews and volunteers used helicopters, boats and heavy-duty vehicles on Saturday to rescue scores of people.
Up to 40 inches of rain and storm surges pushing water inland will produce catastrophic flash flooding, the National Hurricane Centre said.
New Bern was particularly hard hit with reports of more than a hundred people stranded in their homes and in need of rescue.
