At least 32 people have been killed in a monster storm sweeping across much of the U.S. Kansas authorities said eight people died in a highway pileup caused by a dust storm Friday.

Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.

A Kansas highway pileup involving over 70 vehicles claimed at least eight lives, according to the state highway patrol. The severe weather threat will linger through Sunday from Florida northward into the upper Ohio River Valley,

A reported 99 tornadoes across 11 states have left people in a large swath of the south and midwest starting over. NBC News’ Kathy Park reports from Mississippi where a state of emergency is in effect.