It appeared that, as of Friday, Chicago-area residents wouldn't get a reprieve from poor air quality in the near future.

"Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening," the agency said. "Know the signs and symptoms of heat exhaustion ...

Smoke from widespread wildfires in Canada prompted air quality alerts across several Midwest and Northeast U.S. states this ...

A warmer atmosphere can hold more moisture, making storms capable of unleashing huge amounts of rain over land. Studies have ...