Wildfire smoke from Canada and Minnesota has led to a Code Purple alert for Pennsylvania on July 17. See the air quality map.

Canadian wildfire smoke has caused air quality in Washington DC to go beyond Code Red into Code Purple, "Very unhealthy" levels.

Philadelphia issued a "Code Red" air quality alert Thursday due to Canadian wildfire smoke, with air quality reaching "Very ...

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Wildfire smoke has all of Central Pennsylvania, including York County, under a Code Purple alert. The Pennsylvania Department of Environmental Protection (DEP) issued the Code Pur ...

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The air quality in Lancaster County and the rest of Pennsylvania is “very unhealthy” as the entire state approaches the most ...

The Pennsylvania Department of Environmental Protection has declared a statewide Code Purple air quality alert for ...

The news of the upgrade from code red to code purple happened very quickly. Precautions need to be taken by everyone, ...

As the wind continues to blow in from the northwest, fine particles in the air will continue to make their way down across ...