Data: IQAir; Note: Among cities with at least 500k metro-area residents; Chart: Kavya Beheraj/Axios Philadelphia's average air quality got worse in 2023, according to the World Health Organization ...

A huge 3-alarm fire that burned out-of-control about five hours late Tuesday night into Wednesday caused potential air quality concerns, but the surrounding air has been deemed safe for nearby ...

Philadelphia officials say residents of the city's Frankford section can return to their normal routines after a massive fire at an industrial building on Christmas Eve prompted air quality concerns.