Rainfall amounts of 1-2 inches and isolated amounts of 3-5 inches are possible, the National Weather Service said.

Authorities believe more than 160 people may still be missing in Kerr County alone, and 10 more in neighboring areas.

The death toll has now climbed to at least 132, making it America's deadliest rainfall-driven flash flood since 1976.

Kansas has sent specialized water rescue teams to Texas to help with search and rescue operations after severe flooding.