Tens of millions of people across the central and southern US are at risk Tuesday of severe thunderstorms and tornadoes and fire weather on the storm’s warm side and blizzard conditions on its cold side.

The winter storm could impact up to 170 million people across more than 20 states from the southern Plains to the Midwest and East, AccuWeather said.

Dust storms blinded drivers in the Southwest, tornadoes were possible in the South and blizzard conditions descended on the Central Plains.

A mammoth and multifaceted storm – which was dealing wind, fire, choking dust and the threat of a blizzard – pummeled much of the country as it marched east.