I'm a bit surprised there's no thread on this, either in this or Commuter Rail forum. A Metra train derailed in the air-rights "tunnel" of the Chicago Union Station south concourse last night, and Metra and Amtrak south-concourse trains are still delayed today, up to 30 minutes.
https://metrarail.com/about-metra/newsroom/partial-train-derailment-impact-bnsf-southwest-service-heritage-corridor-lines
https://www.amtrak.com/alert/metra-commuter-train-mishap.html
http://www.chicagotribune.com/news/local/breaking/ct-metra-derails-union-station-20171129-story.html
https://metrarail.com/about-metra/newsroom/partial-train-derailment-impact-bnsf-southwest-service-heritage-corridor-lines
https://www.amtrak.com/alert/metra-commuter-train-mishap.html
http://www.chicagotribune.com/news/local/breaking/ct-metra-derails-union-station-20171129-story.html