More than 160 million people across the United States are expected to face winter weather hazards that could cripple their daily lives in coming days, as roads are covered in snow and ice and power lines break from the weight of accumulating ice, according to the National Weather Service’s Weather Prediction Center.

Millions of Americans across the South are forecast to be slammed by ice storms in the coming days as crippling ice accretion threatens widespread power outages, major transportation disruptions, falling trees and downed power lines.

Projected snowfall totals have increased as the track of the major winter storm shifts north, bringing heavier snow and a growing zone of freezing rain into more populated areas. Forecasters from the National Weather Service,

Large parts of the eastern and central United States are expected to see heavy snow. But south of the snow line, forecasters are warning that the storm could deliver dangerously icy conditions. Exactly where that snow vs. ice line will fall was still uncertain on Wednesday.