The collapse of a CTA rail embankment along McCormick Boulevard in Skokie has brought a halt to Yellow Line service today.
The Village of Skokie says the failure of the embankment was discovered after a brief power outage last night.
Shuttle buses are being used to transport passengers over the route between Dempster Street in Skokie and the Howard Street station.
The problem has also led to a closure of McCormick Boulevard between Oakton and Howard streets.
A CTA spokesman tells the Chicago Tribune the failure of the embankment appears to have been caused by a construction project not controlled by the CTA.