Add Yahoo as a preferred source to see more of our stories on Google. As Michigan experiences its first real exposure to wildfire smoke this summer, weather forecasters are talking about the air ...

Most people check the weather before heading outside, but fewer think to check the air. That's starting to change. The Air Quality Index, or AQI, is the system used to warn the public when air ...

As more than 800 wildfires burn across Canada, including dozens of out-of-control fires in western Ontario, the resulting smoke has worsened air quality in various parts of the United States, ...

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range ...

Smoke from wildfires burning in Canada, North Dakota and Minnesota is expected to hit the Chicago area Friday, but what will that mean for the region's air quality? The wildfire smoke is expected to ...

As Michigan experiences its first real exposure to wildfire smoke this summer, weather forecasters are talking about the air quality index, sensitive groups and other terms that may not be familiar to ...