The Brief Philadelphia is experiencing dangerously cold temperatures, with warming stations and shelters filling up across the city. The city’s Code Blue alert remains in effect at least through Sunday or Monday, according to officials. Warming stations open at libraries across PhiladelphiaWhat we know:Ten libraries throughout Philadelphia are serving as warming stations, offering extended hours from as early as 8:00 a.m. until 9:00 p.m., according to Kelly Richards, president and director of the Free Library of Philadelphia. City resources like warming stations and Code Blue alerts are critical for safety during this stretch of freezing weather. For more information on Code Blue and warming resources, visit phila.gov/getwarm.