Storms that swept through Texas and Oklahoma brought high winds and rain, overturning tractor-trailers and damaging roofs. Power outages were climbing in the storm’s wake, with nearly 400,000 customers without power in Texas, about 30,000 in Louisiana and another 25,000 in Mississippi, according to PowerOutage.us.

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.

Powerful storms that killed two people in Mississippi and ripped roofs from buildings in a small Oklahoma town charged across the nation, threatening more communities Wednesday in the central to eastern United States with wide-ranging weather.