Tuesday’s extreme heat, with highs of 96 degrees, is causing delays on Metra trains, including the Union Pacific-Northwest Line.
Trains are running 10 to 15 minutes behind schedule, according to Metra’s website.
When temperatures exceed 95 degrees, trains must operate at reduced speeds to compensate for heat-related stress on the track, switches and signals, the website states.
Metra expects to have more delays during the week as the heat wave continues. Temperatures are expected to cool down by Friday, Sept. 13.