"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at the Respiratory Health Association. "It's going to send people to the emergency room.

Chicago had the worst air quality in the world on Thursday.There is an Air Quality Alert for most of the area through Friday.ABC7 Chicago is now streaming 24/7. Click here to watchThe air quality alert comes due to Canadian wildfire smoke making its way into the area.