Chicago wildfire smoke pushes air quality to some of the world's worst levels
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The wildfire smoke became so thick in Chicago on Thursday that parts of the area saw the worst air quality readings in the world, prompting state officials to issue their highest level Air Pollution Action Day.

When wil Chicago be done with wildfire smoke?
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Fox Chicago Meteorologist Kaitlin Cody explains how long Canadian wildfire smoke will hover over the city.

MAP: Track the worst air quality across Chicagoland

Wildfire smoke pushed Chicago's air quality into hazardous territory Thursday. See where conditions are the worst.

Map: See where wildfire smoke is thickest across US

Heavy smoke from Canadian wildfires spread across large parts of the United States on Thursday, blanketing areas from the Great Lakes to portions of the East Coast.

Photos show thick Canadian wildfire smoke covering Chicago skies

Hazy skies are stretching across Chicagoland as wildfire smoke from Canada creates dangerous air quality. See photos.

'Mini Nerf football': Hailstone produced during severe storms breaks Illinois record
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A Kankakee 14-year-old discovered a larger-than-average hailstone during severe storms in Illinois. That hailstone broke the record for largest hailstone not just in Illinois but possibly for any place east of the Mississippi River. FOX Chicago meteorologist JD Rudd explains how the hailstone was discovered and how researchers found it broke the record.

Hotter nights are costing you sleep: Here's how much

Hotter nights are making it harder for people around the world to get a good night's sleep. A new analysis reveals which cities are impacted the most.

Chicago weather: Air quality alert today as heat wave continues

Chicago is turning up the heat! Sunshine sends temperatures into the upper 90s today, with feels-like temps topping 100° and an air quality alert in effect.

Chicago weather: Heat continues as wildfire smoke increases Thursday

The heat isn't going anywhere yet, but thicker wildfire smoke is expected to move into Chicagoland Thursday. Here's what to expect.