The National Weather Service warned of extreme weather across a vast swath of the country that is home to more than 100 ...

The Storm Prediction Center designated the day as "high risk" for severe weather, especially in the Deep South.

At least 18 people have been killed in a monster storm sweeping across much of the U.S. As of Saturday afternoon, Missouri ...

At least 17 people have been killed in a monster storm sweeping across much of the U.S. Ten people were killed in Missouri ...

At least six people have been killed in a monster storm sweeping across much of the U.S. Three people were killed in southern ...

At least five people have been killed in a monster storm sweeping across much of the U.S. At least two people were killed in ...

At least five people have been killed in a monster storm sweeping across much of the U.S. At least two people were killed in ...

The threat of tornadoes is moving east into the Mississippi Valley and Deep South a day after a massive storm system moving ...

The threat of tornadoes moved east into the Mississippi Valley and Deep South on Saturday, a day after a massive storm system ...