The National Weather Service has issued a flash flood emergency for Little Rock, North Little Rock, and Conway, Arkansas, warning of life-threatening flooding and urging residents to seek higher ground immediately.

At least 20 people were killed in weather-related fatalities this week, including tornadoes that destroyed entire neighborhoods.

Flooding worsened across the U.S. South and Midwest, threatening communities already waterlogged and badly damaged by days of heavy rain and storms that killed at least 23 people.