Chicago faces an air quality alert due to Canadian wildfire smoke and high ozone levels, with risks for sensitive groups.

As the city's surface warms, it heats the air above it, causing that air to rise. This rising motion can pull in smoke-laden ...

We’re more than two-thirds of the way through Chicago’s meteorological summer, and so far when the weather hasn’t been suffocatingly hot and humid, it’s featured air that’s dangerous for too many of ...