A four-day, once-in-a-generation weather event is pounding the middle of the U.S. with destructive tornadoes and life-threatening flooding.

Repeated waves of thunderstorms will pose risks to lives and property through the weekend in the same areas that were blasted ...

At least 1 dead, 10 hurt as 'dangerous' system hits much of U.S., spins up tornadoes and flood risk ...