Heavy snow and frigid winds leaves millions without power across the US – as it happened

• US faces once in a generation' freeze for Christmas
• Migrants stuck on US-Mexico border as temperatures plummet
• Snowplow driver shortage threatens to leave Americans adrift

Over 10,000 flights across the US have been impacted by the winter storm as of Friday afternoon.

According to FlightAware.com, as of 3pm ET, there have been a total of 6,238 delays within, into, or out of the US today.