A severe winter storm is impacting over 70 million people across 15 states from Tennessee to Maine. Winter storm warnings are in effect with significant snowfall and dangerous cold temperatures expected. Residents are urged to take precautions, and emergency measures have been activated in several states, including Louisiana. Some areas could see snowfall of up to three feet while frigid air from the polar vortex triggers hazardous conditions in the central and eastern U.S., affecting travel and daily activities.