(WTAJ) — As wildfires continue, another air quality alert is being issued for a dozen Pennsylvania counties.
The Code Orange alert will be in effect Monday, July 20, in Lawrence, Butler, Armstrong, Indiana, Cambria, Beaver, Allegheny, Westmoreland, Washington, Greene, Fayette and Somerset counties, according to the Pennsylvania Department of Environmental Protection (DEP).
A temperature inversion will hold residual wildfire smoke near the surface, pushing particulate matter 2.5 levels into the Code Orange range…