People seek shelter in the aftermath of the ice storm at Boyle County High School in Danville, Ky., on Friday. The crippling winter storm has plunged about a million customers into the dark from the Midwest to the East Coast.Utility crews renewed work in subfreezing temperatures Saturday in their effort to put the power back on for nearly a million customers left in the dark by an ice storm that crippled parts of several states this week.