Been a wild 18 hours in the travel world. Lots of cancellations. Lots of unscheduled overnights for crews and passengers waiting to get places. Wind chill creates bad situation for ground ops. They can only stay outside for a very limited amount of time. Anti-ice fluid failure/holdover time exceedance issues in places like Denver have been common. -17F ambient with wind chills at -35F is no joke. Be safe out there.