Add Yahoo as a preferred source to see more of our stories on Google. Wildfires are raging across Canada, and the smoke is being pushed southward. On June 7, extremely poor air quality turned the sky ...

After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free skies this week. The Air Quality Index (AQI) — which measures the ...

PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...

In recent days, the air quality index has been at "Unhealthy" levels in New York City from the Canadian wildfires smoke. People have been warned to avoid outdoor physical activities. Those who spend ...

If your home has an air purifier, you might have noticed a number on it measuring something called AQI. But what does it mean ...

An air quality advisory is in effect for downstate New York on Friday. Limit outdoor activity if you are at risk.

With elevated pollution levels, the New York State Department of Health recommends individuals consider limiting strenuous ...