The winter storm is here and two-thirds of the US population is facing this extreme cold. More than half of all Americas will experience subzero wind chills over the next 3 days.

As extreme cold weather grips large sections of the United States, people still need to work and live their lives. CNN wellness expert Dr. Leana Wen has guidance.

A powerful winter storm swept across the central and eastern United States, knocking out power and snarling travel during one of the busiest stretches of the holiday season. The wide-ranging storm ...