In Hunting Park, the Philadelphia Streets Department deployed more than 440 pieces of equipment that's responsible for more than 2,500 miles of streets and highways.
Chief highway engineer Steve Lorenz of the Philadelphia Streets Department says the biggest challenge over the next 24 hours will be the heavier snow that lands overnight.
"The heavier snow overnight.. and not so much the colder temperature and freezing to the highway, but the (snow) drifting," said Lorenz.
Inclement weather triggered a snow emergency across the city.
RELATED: Snow Emergency begins at 7 p.m. in Philly; Vaccine clinics, after-school activities canceled
At Philadelphia International Airport, the board spelled out delays and cancellations ahead of the storm.
Meanwhile, outreach workers are racing to get those most vulnerable indoors.
"We're in a code blue right now. We're not discharging," said Zak Krone, operations associate of Our Brother's Place.
Local city shelters said they are packed with intakes.