A man carries blankets as an Arctic blast brings single-digit temperatures with wind chills below zero on Thursday, Dec. 12, 2024, in Chicago. (AP Photo/Charles Rex Arbogast)

Steam from a restaurant's exhaust fan is blown down as alley as an Arctic blast brings single-digit temperatures with wind chills below zero on Thursday, Dec. 12, 2024, in Chicago. (AP Photo/Charles Rex Arbogast)

A sign shows the current outdoor temperature in the Chicago suburb of Wheeling, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

A commuter bundles up as she gets on a bus during cold weather in Wheeling, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

A construction worker bundles up as he works during cold weather in Northbrook, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

A commuter walks to a Metra train station during cold weather in Northbrook, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

Commuters walk to the train station during cold weather in Northbrook, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

Pedestrian bundles up as he walks at a Metra train station during cold weather in Northbrook, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)