A deadly winter storm is pummeling Washington, DC, and the mid-Atlantic Monday after causing hundreds of crashes and flight cancellations and knocking out power to hundreds of thousands in the central United States over the weekend.

The storm caused thousands of flights and dozens of train trips to be delayed or canceled. At Ronald Reagan National Airport in Washington, all runways were closed Monday evening.

The first major winter storm of the year that stretched across the U.S. is continuing its deadly journey eastward, where cities in the mid-Atlantic, like Washington, Baltimore and Philadelphia, are now experiencing significant impacts from heavy snow and ice.