Ten people have died from torrential rain and flooding in southeastern Louisiana, which Gov. John Bel Edwards today described as "unprecedented" and "historic."
About 40,000 homes have been affected by the flooding, Edwards said.
More than 20,000 people have been rescued and about 8,000 were in shelters Monday night, according to Edwards.
President Obama declared a federal emergency in the state on Sunday.
Search-and-rescue operations were still underway on Tuesday.
Rain-swollen rivers are receding in much of the state, but some communities in southern Louisiana are bracing for waters that have not yet crested, according to national forecasters.
The state planned to impose curfews on Tuesday night in the parishes with widespread damage.
"This is a historic flooding event," Edwards said of the unnamed storm. "It’s unprecedented."
The storm dumped more than 2-1/2 feet (0.76 meters) of rain on an area near Watson, Louisiana, from Thursday to Monday morning, the highest total reported, according to the National Weather Service.
In Abbeville, Louisiana, a 125-year-old record for 24-hour rainfall was shattered by 16.38 inches (41.61 cm) of rain from Friday to Saturday, the weather service reported.
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