At least 37 people have died across seven states as powerful storm systems swept through the Midwest and the South.

Residents are surveying damage from unusually vicious weather in multiple U.S. states where violent twisters, blinding dust storms and fast-moving wildfires decimated entire neighborhoods. As of Sunday afternoon, at least 37 people had been killed as a sprawling storm barreled across the nation’s midsection toward the East Coast.

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.