What started as an evening commute headache in Oak Park turned out to be a false alarm, after hazmat teams determined an unknown white powder at the village's Metra station was harmless. Trains on the Union Pacific West line and the CTA Green Line were briefly delayed before full service resumed later Wednesday night.
Village officials said police and fire crews were called to the Metra facility just before 6 p.m. after someone spotted an unidentified white substance, according to CBS Chicago. A hazmat team tested the material and, per the village, identified it as cornstarch with traces of two other elements described as non-threatening. CBS also reported that a Metra police officer was taken to Rush Oak Park as a precaution; the officer was later discharged and returned to duty.
Station Layout Made Delays Spread Across Systems
The Oak Park Metra stop sits directly beside the CTA's Harlem/Lake Green Line station, creating an easy transfer point where a problem on one platform can quickly ripple to the other, per Metra. That tight connection meant the hazmat response around the Metra tracks affected both commuter rail and rapid-transit schedules.
Service Restored After Tests
Metra posted on social media that inbound and outbound UP-W trains would resume their scheduled stops in Oak Park, and the CTA said earlier Green Line delays had cleared, according to CBS Chicago. Officials said no further information was immediately available as crews wrapped up work and cleared the scene.
Why Metra Police Were On Scene
Metra assumed operational control of the Oak Park station last year, taking over maintenance and security duties at the facility, the Village of Oak Park notes. That shift put Metra police on the front lines for incidents at the stop and helps explain why a Metra officer, rather than village police, was directly involved in the emergency response. The move included plans for enhanced security and patrols at the station.
Riders are encouraged to check Metra's UP-W service page or the CTA's alerts page for the latest updates and any lingering delays. Both agencies post real-time notices online and on social media whenever incidents affect service.
