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PHILADELPHIA, PENNSYLVANIA - JANUARY 23: People walk and bike down Broad Street in Philadelphia as snow continues to fall on January 23, 2016 in Philadelphia, Pennsylvania. The city, which announced a snow emergency, is expected to get over 18 inches of snowfall, along with much of the Mid Atlantic States. (Photo by Jessica Kourkounis/Getty Images)

PHILADELPHIA, PENNSYLVANIA  - JANUARY 23:  People walk and bike down Broad Street in Philadelphia as snow continues to fall on January 23, 2016 in Philadelphia, Pennsylvania. The city, which announced a snow emergency, is expected to get over 18 inches of snowfall, along with much of the Mid Atlantic States. (Photo by Jessica Kourkounis/Getty Images)