Nearly a million people across the United States are without power and more than 10,000 flights have been cancelled as a severe winter storm sweeps across the eastern two-thirds of the country, bringing heavy snowfall, freezing rain and dangerously low temperatures, according to a report by Al Jazeera.

On Sunday, the National Weather Service (NWS) warned that sub-freezing temperatures and hazardous conditions could persist for several days, causing "dangerous travel and infrastructure impacts." More than 850,000 customers were without electricity, according to PowerOutage.us, with at least 290,000 in Tennessee and over 100,000 each in Mississippi, Texas and Louisiana. Other affected states include Kentucky, Georgia, Virginia, and Alabama.