Air quality varies based on the type of pollutants in the cycle and can have dramatic ramifications for those breathing ...

Smoke drifting throughout the United States as a result of massive Canadian wildfires continues to leave millions of Americans at risk of exposure to extremely poor air quality. As of Wednesday, more ...

Add Yahoo as a preferred source to see more of our stories on Google. The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) But many ...

Polluted air will remain a threat Friday for millions of Americans across the eastern United States as the Canadian wildfires continue to send smoke billowing across the region, tinging the skies with ...

Air quality conditions across several U.S. cities reached levels this week that federal agencies deem "unhealthy for sensitive groups," prompting health alerts and recommendations that children and ...

SIOUX FALLS, S.D. (KELO) — The air quality index (AQI) in Sioux Falls as of noon on Wednesday was 152, placing it within the unhealthy range of 150 – 200. This is thanks in large part to wildfire ...

Knowing how to read the EPA's Air Quality Index can help you understand whether smoke from numerous Canadian wildfires makes it hazardous to breathe outside air. "The AQI is an index for reporting ...

Brush fires continue to burn across the North Shore of Massachusetts and helicopters are back in the air trying to knock down the fires. You can check the air quality in your town using the ...