CHICAGO (WLS) -- Most of the Chicago area remains under an Air Quality Alert on Saturday due to smoke from Canadian wildfires.

The alert was, at one point, set to expire late Friday night for most of the area, but it was extended through Sunday. The National Weather Service said the alert issued by the Illinois Environmental Protection Agency is set to expire at midnight Monday.

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AccuWeather Meteorologist Jaisol Martinez said haze from the smoke would still be visible on Saturday, but the air quality index in Chicago is slowly improving.

Conditions remained unhealthy for sensitive groups on Saturday, an improvement from being unhealthy for everyone, Martinez said.

Meanwhile, Lollapalooza is being held this weekend, drawing th

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