Emergency crews have rescued more than 7,000 people stranded in Louisiana by historic flooding that has killed at least three people and submerged whole communities, Governor John Bel Edwards said on Sunday, as the U.S. Gulf Coast braced for more rain and rising waters. Stranded residents have been pulled out of flooded homes and swamped cars in cities and towns across the southern part of the state. While the brunt of the storm that brought torrential rains and flooding to the area was moving west toward Texas on Sunday, Louisiana residents should remain cautious, the governor said. Some 5,000 people were forced to sleep in shelters overnight. There were not enough beds to house all of the shelter-seekers, so many had to sleep on floors.