On June 24, the city released initial air quality test results. But the analysis was flawed, some experts said.

Cook County is under a heat watch through Thursday evening. Temperatures could feel like 105-110 degrees Wednesday.

The Cram fire is the largest in the state, expanding overnight to more than 64,000 acres, according to the Northwest ...

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

The National Weather Service has issued both a heat and air quality alert for most of downstate New York, Wednesday, July 16.

Central Ohio counties face an Air Quality Alert as ozone levels rise due to high pressure and sunny conditions.

At 9:13 a.m. on Wednesday, the National Weather Service reported an air quality alert in effect until Thursday at midnight ...

The National Weather Service reported an air quality alert at 3:46 p.m. on Tuesday in effect until Wednesday at 11:15 p.m.

EDT the National Weather Service reported an air quality alert in effect until Thursday at 1:30 a.m. EDT for Cass and Berrien ...

A smoke map from NOAA shows Colorado will be almost entirely covered with smoke on Thursday as wildfires burn thousands of ...

Conditions continued to worsen after the region was put under an Environment Canada Air Quality Warning Monday afternoon. A ...