Philadelphia has declared its fourth Code Blue of the season as temperatures dip below freezing, triggering expanded outreach efforts and additional shelter space for residents experiencing homelessness.

A Code Blue is activated when temperatures or wind chills drop to dangerous levels. Cheryl Hill, executive director of the City's Office of Homeless Services (OHS) , said the declaration sets several emergency protocols into motion aimed at getting people indoors.

"Any time the weather drops below 32 degrees, or the windchill's about 20, then we add additional resources with our partners throughout the city to be able to get people in so that they don't have to sleep outside in the cold," Hill said.

Hill said the city is significantly expanding bed space as winter conditions intensif

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