At least 4 people are dead as massive snowstorm creates dangerous travel conditions

At least 4 people are dead as massive snowstorm creates dangerous travel conditions toggle caption Carolyn Kaster/AP At least four people have died and dozens have been injured as a major winter storm moves across several states from the Midwest to the mid-Atlantic, with officials warning those in its path to stay off the roads. "Snow is still making its way out of the state, but don't expect conditions to improve quickly – if you saw snow and ice fall yesterday, continue to AVOID TRAVELING today," the Missouri Department of Transportation said in a social media post on Monday. toggle caption Chase Castor/Getty Images Winter storm warning in effect The National Weather Service issued winter storm warnings in parts of Missouri, Illinois, Kentucky, Indiana, Ohio, Virginia, West Virginia, Maryland, Pennsylvania and Washington, D.C. More than 300,000 customers were without power as of noon ET Monday across Virginia, West Virginia, Kentucky, Indiana, Illinois and Missouri, according to Poweroutage.us. On Tuesday, temperatures are expected to remain below freezing and nighttime temperatures will "fall into the single double digits" until late this week across the Central Plains and states across the Mississippi and Ohio Valleys, according to the National Weather Service.