In the early hours of Tuesday morning, FlightAware recorded over 1,000 flight cancellations within, into or out of the U.S.

"An Arctic siege has taken over our state," says New York governor Kathy Hochul, adding: "It is brutal, it is bone-chilling and it is dangerous."

Most of the delayed flights at the time of publication were through Southwest Airlines, while most of the canceled flights were through American Airlines.