Significant severe weather and life-threatening flash flooding continue to impact much of the mid-South up through the Ohio River Valley.

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

Around 73 million people are under flood alerts — including flood advisories, watches and warnings, the later indicating life-threatening flooding is imminent or underway — from Texas to western Pennsylvania, the weather service said. Alerts were likely to remain in place through Sunday morning.