Firefighter battling the 2005 Capp Street fire, which killed three. [Photo courtesy of Spencer Mack]

Smoke had filled her apartment and she yelled for help before plummeting three stories to the sidewalk. According to an account of her ordeal written by a local non-profit, Estrada spent months recuperating at San Francisco General Hospital where doctors, struck by her resilience, called her “milagros,” or “miracle.” Her husband, daughter and another man died in the same fire at 395 Capp Street 11 years ago today. Nine others were injured.

“To this day I don’t know I how survived,” Estrada told the non-profit, Instituto Laboral de la Raza, which helped her and other victims of the blaze.

The deadliest fire in the Mission in more than 10 years, the Sept. 15, 2005 fire at Capp and 19th Streets could be traced back to a simple household item: a mattress.

The official cause of the fire remains undetermined. But investigators said in a report that it “most probably involved” the full-size mattress left in the 12-unit building’s narrow stairwell — the residents’ primary path to safety.

According to the March 2, 2006 fire investigation report, one of the men who lived in the building said he did not see the mattress when he left around 1:50 a.m. Less than an hour later, it mysteriously appeared.

Oddly positioned at the bottom of the staircase on the first floor, the mattress burned so intensely that no material was left on it and the door to nearby apartment No.1 gave way and fell on top of it, the report said.

It also proved a fiery obstacle for firefighters who arrived on scene just after 2:30 a.m.; one woman recalled getting her boot stuck in the mattress as she pulled a fire hose up the stairs. Another firefighter, Nicol Juratovic, suffered second- and third-degree burns from the heated mattress coils, according to a San Francisco Chronicle article dated Sept. 16, 2005.

Fire Chief Joanne Hayes-White described it as a “stubborn obstacle” at the time.

“Because of the bed, they didn’t get much past that first floor landing,” she told the paper.

The apartment’s stairs and what remained of the mattress, from a 2006 fire investigation report.

When fire investigators arrived, they saw flames “pouring out of a second-story window and extending to the third floor and roof.” Flames were also licking the roof from that window to Estrada’s apartment, no. 9. The three-alarm fire caused an estimated $1 million in damage and killed Mirtha “Lizette” Estrada, 23, Pastor Justo Estrada, 76, and Hilario Moreno-Demeza, 27. Six firefighters were among the 10 injured.

Despite the blaze’s gut-wrenching details, San Francisco Fire Department spokesman Jonathan Baxter declined to comment on whether he considered it one of the neighborhood’s worst. However, a map created by activist group Anti-Eviction Mapping Project using fire department data from January 2005 through May 2016 indicates that there were no other fires in the city during that time period with as many fatalities.

The fire report does not speculate as to whether the mattress came from inside the building or was dragged in from the street. It does mention police smelling gasoline in apartment No. 9 during a follow-up investigation, but said inspectors ultimately could not “conclusively determine the exact ignition scenario.”

Baxter said the cause remains undetermined barring any new evidence.

“Since the completion of this report, there has been no introduction or discovery of new information,” he wrote in response to a list of questions. “Furthermore, no person(s) have come forward with any new information regarding this report.”

Flames rage in the 395 Capp Street’s front window. [Photo courtesy of Spencer Mack]

Pastor Estrada’s body was in a bedroom, while Lizette Estrada’s was found in apartment No.12, where firefighters reportedly moved her after finding her on the second-story landing below, according to the lawsuit.

The suit alleged that 395 Capp Street’s owners were negligent in the ownership, operation, management, maintenance and remodeling of the building, and failed to comply with permit requirements during their renovations, which “would have triggered fire safety inspections and enforcements.” The suit also accused the landlords of not complying with building and fire codes. The case ultimately settled in March 2010.

Property records show that Joseph and Julianne Schoepp purchased the building about a year before the fire. Joseph Schoepp did not respond to a message left for him through his family’s locksmith business.

While Estrada did initially agree to an interview, she failed to return subsequent calls from a Spanish-speaking third party who was helping to work out a meeting time.

Edward Nevin, who initially represented Estrada in the wrongful death suit but was later replaced by another attorney, said he wouldn’t blame her if she changed her mind and didn’t want to talk. But , he noted, “her story deserves to be told.

“It was a horrible, horrible experience. She just never really could recover emotionally. I just felt sorry for her,” Nevin said. “Her entire life died that night.”