The snow-covered roofs of homes in a neighboring city of the Washington Dulles International Airport, Friday, Jan. 29, 2016, in Washington D.C. On January 20–22, the governors of eleven states and the mayor of Washington, D.C. declared a state of emergency in anticipation of significant snowfall and blizzard conditions. Approximately 103 million people were affected by the storm, with 33 million people under blizzard warnings.