As people seek ways to stay safe, it is important to understand how the air quality index, or AQI ... the different color codes used and what you should do to protect your health.

Each code has a definitive "values of index" range and corresponds to different levels of health concerns. A higher AQI value indicates a greater level of air pollution and a greater health concern.

Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as ...

But what exactly is a code red alert—and what risk does all that air pollution pose to your health? Here’s how to decode the Air Quality Index. What is the Air Quality Index? The term “code ...

Although the majority of wildfires are occurring in western Canada, smoke from these fires has been drifting eastward, ...