Missouri's governor declared a state of emergency ahead of expected heavy rains, and warned that levees could be overtopped, NBC News reported.
"Areas along the Missouri River and its tributaries in west-central Missouri are of particular concern because more rain could cause some levees to overtop," Gov. Jay Nixon said in a statement issued on Friday evening.
Since Tuesday, storms in the state have caused high winds, heavy rains and flash flooding — with more rain predicted into the weekend.
Meanwhile, warnings were issued for South Carolina's coast Friday after a weather system that could become a tropical storm formed in the Atlantic, the National Weather Service said.
Heavy rain, whipping winds and dangerous waves could hit the Carolinas, Georgia and Florida over the holiday weekend, forecasters said.