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

Pedestrian bundles up as she walks on the sidewalk during cold weather in Wheeling, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

A pedestrian bundles up as she walks on the sidewalk during cold weather in Wheeling, Ill., Thursday, Dec. 12, 2024. (AP Photo/Nam Y. Huh)

A pedestrian walks past steam released in the air 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)

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

Commuters wait under a warming light for a Chicago Transit Authority train 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 couple push a baby carriage past steam released in the air 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)