- Holt Francis, 27, is the 13th victim of last week's Bronx fire
- December was the worst month in decades for New York fire deaths
Holt Francis, who had been listed in critical condition since the fire, was pronounced dead on Thursday, according to police spokeswoman Arlene Muniz.
Officials previously said Karen Francis, 37, Kylie Francis, 2, and Charmela Francis, 7, were killed in the fire. CNN is working to determine the exact nature of their relationship.
The fatal fire capped a particularly bad year for civilian fire deaths in New York. There were 73 civilian fire deaths in 2017, a major increase from 2016, when there were 48, Fire Commissioner Daniel Nigro said. The 2016 number was the lowest in 100 years of accurate statistics, Nigro said.
In December, there were 26 deaths -- the highest number in any month in decades, the New York City Fire Department said. In addition to the Bronx fire, four people died in a Brooklyn fire on December 18.
Still, serious fires declined 8 percent in 2017 compared to 2016, and there were more than 400 fewer serious fires compared to 2015, a 15.5% reduction, the fire department said.
Bronx fire victims
The fatal blaze began after a 3-year-old played with burners on the stove and started a kitchen fire, officials said. When the boy's mother fled the apartment with the boy and his 2-year-old sister, she left the door open.
The apartment's stairway acted "like a chimney" and the fire rapidly spread through the apartment building, Nigro said.
Four children were among the 13 people who perished.
Nigro said there were no structural issues that contributed to the fire. The building had a "relatively low history of repair violations," a spokesperson for New York City Housing Preservation and Development said.
One victim, 28-year-old Emmanuel Mensah, served in the National Guard. He was home for the holidays and died while trying to rescue his neighbors
from the burning building, his father said.
"Private Emmanuel Mensah was a first-generation immigrant, a soldier and a New Yorker. He gave his life rescuing his neighbors in the Bronx fire. His heroism exemplifies the best of our city. Rest in peace," Mayor Bill de Blasio said Saturday.