The sudden heat wave has caused a traffic nightmare in the north suburbs.
A buckle in the highway emerged Tuesday, causing traffic to slow significantly during rush hour.
Crews from multiple agencies worked to fix the issue.
An alert sent out by the city of Highland Park cited "changing weather conditions" as the reason for why it happened, but it's this time of year that Chicago area drivers are used to seeing road issues while getting around.
Illinois State Police, IDOT and the city of Highland Park will continue to assess the road’s condition. Drivers can expect delays Wednesday and are being encouraged to avoid the highway.