Several people were killed in the US after drenching thunderstorms moved through Louisiana and Mississippi at the weekend, triggering flooding across the lower Mississippi valley, authorities said.
Rainfall killed three people in Louisiana and one in Oklahoma. Two fishermen were missing in Mississippi on Sunday, according to emergency management officials.
President Barack Obama declared flooding in Louisiana a major disaster on Sunday, providing aid for victims.
Louisiana's emergency management office warned in a statement "the crisis is not over." It said 5,000 homes had already been damaged.
The National Weather Service (NWS) warned on Sunday night of a tornado threat and potential for hail and damaging winds across eastern Arkansas and northern Louisiana.
Portions of the lower Mississippi Valley were at risk for severe thunderstorms through Monday morning, the NWS said, which could trigger flash flooding. River levels were expected to remain high in the region as excessive rain water drains, it said.
The Louisiana National Guard, working around the clock for several days, said it had rescued more than 3,200 citizens and 300 pets.
Authorities and meteorologists described the flooding as historic and the worst seen in the region apart from that spawned by hurricanes.
Scores of roads and bridges were closed throughout the region at the weekend. In Mississippi, almost 400 homes suffered damage from the rainfall and flooding, the state emergency agency said.