Thanks for the updates. I don't Twitter, my best source is out-of-town and I missed the warning on the VIA website until later last night. It sounds like the day totally unravelled for several reasons. I was just curious since we were sitting outside as usual during this daily peak time and only one of the 8-10 scheduled passenger trains actually passed by, and it was almost 5 hours late. When you're used to a routine, silence can be quite a shock. The apps that show train positions, their speed and status, don't include a reason unless the train is cancelled outright. Freight is light on Sundays during daylight hours, so the one freight wasn't a surprise.
As an aside, our community is considering a ban on train horns entirely, but a recent public meeting showed an almost even divide among the participants and CN was having none of it without huge infrastructure changes.