Air Quality Alert issued June 11 at 4:30PM EDT by NWS Pittsburgh PA

The Pennsylvania Department of Environmental Protection has
issued a code ORANGE air quality alert for Thursday, including
the greater Pittsburgh region, including Allegheny, Butler,
Beaver, Armstrong, Washington, Westmoreland and Fayette counties.

A code ORANGE air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, the elderly,
and people suffering from asthma, heart disease, or other lung
diseases. The effects of air pollution can be minimized by
avoiding outdoor exercise or strenuous activity.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/