As millions of Americans hunker down for the winter storm, 19 states and Washington, D.C., have declared states of emergency.

Winter storm warnings and weather advisories from the NWS span Alaska, Michigan, New York, and Indiana as of early Tuesday.

On Sunday, millions from New Mexico to the Northeast saw impacts from Winter Storm Fern. Thick layers of ice remain on the ground and power lines, and outages across the South skyrocketed as a result. The storm has claimed the lives of two men in Louisiana. Officials there confirm they both died of hypothermia.

Heavy snow fell in more than a dozen states from New Mexico to Maine. Bonita Lake, New Mexico, an area in the south-central part of the state, received 31 inches of snow over the weekend, the most of any area in the United States, according to the preliminary data.

Cardiologists say shoveling snow can increase a person's risk of experiencing a heart attack.

Winter storm: Death toll rises as winter storm continues dumping snow across the U.S Heavy snow, sleet and freezing rain are slamming large parts of the U.S. as the dangerously cold weather causes major power outages and travel disruptions.

Brutal cold lingered in the wake of a massive storm that dumped deep snow across more than 1,300 miles from Arkansas to the Northeast and left parts of the South coated in treacherous ice.

A woman in Norwood, Massachusetts was hit and killed by a snow plow truck while walking with her husband in an MBTA parking lot during Sunday's winter storm.