At least 10 people have died in multiple US states due to severe winter weather across the country as a powerful storm system that brought golf ball-sized hail and tornadoes to the South continues to march late Friday across the Mid-Atlantic and Northeast, CNN reported.

The storm spurred wind gusts strong enough to topple tractor-trailer trucks, leaving more than 1 million people without power, and threatening to bring more torrential rain, tornadoes, and heavy snow.

Among those killed due to weather were at least three Kentuckians, Gov. Andy Beshear confirmed Friday afternoon. A fourth death in Kentucky was reported in Lexington after a tree fell onto a vehicle, killing a 41-year-old woman, the Fayette County coroner’s office tells CNN.

Three other people died in Alabama, one in Arkansas, one in Mississippi, and one in California, according to officials.