Winter storm live updates: Multiple deaths reported as snow slams mid-Atlantic region; over 1,900 flight cancellations
The storm has caused severe air travel disruptions. According to FlightAware, more than 1,800 flights in and out of the U.S. have been canceled so far, including nearly 500 at Reagan National and more than 250 at Chicago's O'Hare International Airport, which issued a temporary ground stop earlier Monday due to snow and ice.