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 "unhealthy" ...

Smoke from Canadian wildfires has impacted the air quality throughout United States, including in the northern High Plains, Midwest, Great Lakes, southern Mid-Atlantic and into the Northeast. This has ...

The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) But many Angelenos aren’t sure if the AQI tells the full story, especially given how ...

If you live in regions like North India or cities like Delhi, what dominates concerns for every individual and family November onwards is the worsening AQI. Air Quality Index (AQI) numbers dominate ...

The Air Quality Index (AQI) is used by various government agencies to report how clean or polluted the air is in your area. For example, you may have spotted this metric popping up in local weather ...

Firefighters work inside a burned structure. After California’s Eaton fire was suppressed in January, invisible gases continued to permeate the air, exposing residents and first responders to ...