Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

I've lived in Oregon for a decade, meaning I've experienced multiple wildfire seasons. You learn quickly, in these conditions ...

NCR's air quality on Wednesday invoked curbs under stage 4 of the Graded Response Action Plan (GRAP) amid a sharp dip in air ...

Good (Green): 0-50 AQI means there is little or no health risk associated with air quality. Moderate (Yellow): 51-100 AQI ...

As people return to the structures spared from Los Angeles wildfires, experts warn that they should be careful of the air ...

Air quality across parts of California is deteriorating to hazardous levels as strong winds drive rapid wildfire spread and ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn’t breathe a ...

The USA TODAY analysis focused on days were the Air Quality Index, or AQI, was above 100. At this point, breathing the air primarily poses a risk to sensitive groups but can also impact healthy ...

Air quality in Metro Vancouver is not being impacted by the wildfires raging in California. According to officials, the air ...

Health experts advise residents to avoid outdoor exercise, keep windows closed, use air purifiers and wear masks outdoors - ...

A Reuters analysis shows that Berkshire coal plants emit more nitrogen oxide gases than any other coal-fired fleet in the ...