At least 13 people, including seven children, died as a quick-moving fire ripped through a crowded home in Philadelphia early Wednesday morning, officials said. “This is without a doubt one of the most tragic days in our city’s history, the loss of so many people in such a tragic way,” Philadelphia Mayor Jim Kenney told reporters at a news conference. Officials told 6ABC that 18 people live in a second-floor apartment on the three-story rowhouse, while another eight people lived on the first floor. “Losing so many kids is just devastating,” added Kenney. “Keep these babies in your prayers.” But Kenney continued to say that “you don’t know the circumstances of each and every family and maybe there were relatives or people that needed to be sheltered. “Obviously the tragedy happened and we all mourn for it but we can’t make judgment on the number of people in the house …