The National Weather Service said a “multitude of hazardous weather” would impact the U.S. over the next several days — from thunderstorms and potentially baseball-sized hail on the Plains, to heavy mountain snow in the West and dangerous heat in the South.

A devastating tornado in Kentucky damaged hundreds of homes, tossed vehicles, left many homeless, and killed at least 19 people, most of them in southeastern Laurel County.

Emergency crews have been spread out across portions of Arkansas and Oklahoma as relentless rounds of severe weather and tornadoes blasted the region on Monday, damaging homes and knocking out power.