This month's record-breaking storms have brought nearly 300 tornadoes, millions of dollars in damage and at least 39 deaths.
Now, residents in the South and Midwest are facing severe thunderstorms.
North of Little Rock, Ark., a series of tornadoes killed four and flash floods killed three more people. Crews are still searching for those missing.
Caroline Thompson and her family survived even though every tree in their yard fell on their house.
"We all ended up in the closet and then we heard crashing and stuff being knocked around and blown around," she said. "It just tore us up."
Authorities have now issued flood warnings in 17 states.
The biggest concern is in the small town of Poplar Bluff in southeast Missouri where a levee on the Black River could go at any time.
Emergency workers have evacuated some 1,000 people, and National Guard troops are on the way.
Overnight, five states in the southern plains reported at least 38 twisters.
In Texas, golf ball-sized hail shattered car windshields. Winds up to 100 mph also destroyed business signs and tossed highway signs.
Newly-released video from Lambert Airport in St. Louis, Mo., showed the strength of the storm system. There, 135 mph winds forced Transportation Security Administration agents to scurry for safety.
Already this month, 18 states have been declared disaster areas and the heart of the severe weather season is yet to come.