An official for Metra said the person was struck near the Harlem Avenue station in Berwyn Friday morning.
Officials said Monday flights could be delayed up to 45 minutes at their departure airport in order to manage traffic capacity at O'Hare.
Officials from the City of Berwyn said repairs on the area surrounding the 1400 block of Wesley Avenue began Wednesday morning.
The man, 58, was at the Cicero train station in the 700 block of Cicero Avenue when he stumbled and fell onto the tracks, police said
Trains can't enter or exit the station, Metra said.
Crews cleared downed electrical lines, however Metra warned to expect major delays and cancellations.