Tragedy

 https://www.washingtonpost.com/nation/2022/01/05/philadelphia-fatal-rowhome-fire/

The home had a number of working smoke detectors, powered by lithium batteries meant to last 10 years, at its last inspection, Murphy said, but several were not operating at the time of the fire.

About 26 people lived in the rowhouse, Murphy said, with eight on the first floor and 18 in a unit spanning the second and third floors. He said he was unaware of the city’s occupancy limits for that kind of home but noted that the number “is a tremendous amount of people to be living in a duplex.”