More than 16,000 flights were canceled from Thursday to Christmas Day. Almost two-thirds of the U.S. population was under a wind chill warning or wind chill advisory. Large portions of the mid-South and Carolinas dealt with managed power cuts to prevent grid failure. At least 25 deaths occurred around Buffalo, making this one of the city’s deadliest modern-day weather events. Casper, Wyo., saw its lowest temperature in recorded history on Thursday morning. In Miami, a high of 50 was its coldest on record for the date.
