Work for Commuter rail. The amount of issues on Saturday morning were like nothing the infrastructure has ever seen before. Multiple signals just stopped working, hundreds of frozen switches, crossing gates not operating and the worst of them all- broken rails everywhere. About 75% of service on Saturday had to be canceled or had severe delays (more than 30min late). Afternoon improved as issues were fixed and things stated thawing (being able to operate in regular cold) but there were residual issue until Monday morning.
Waaaay more problematic than a snowstorm/blizzard or any type of record heat.
Truly a once in a generation event