Overview
- PA DEP and the National Weather Service have active Code Orange alerts today for the Liberty/Clairton area of Allegheny County and for Cumberland, Dauphin, Lancaster, Lebanon, and York counties, generally in effect until about 7 p.m.
- Fine particle pollution increased overnight and is expected to rise during the day under stagnant conditions.
- A Code Orange designation means air pollution may be unhealthy for sensitive groups, including children, older adults, and people with asthma, heart or lung disease.
- Guidance urges sensitive individuals to limit strenuous outdoor activity and asks residents to reduce emissions by avoiding wood-burning, open fires, and gas‑powered lawn and garden equipment.
- Residents are directed to monitor real-time conditions on AirNow, with forecasters indicating improvement after tonight as winds increase.