Flames moved so quickly through the 75-foot (23-meter) vessel that it blocked a narrow stairway and an escape hatch leading to the upper decks, giving those below virtually no chance of escaping, authorities said.
DNA will be needed to identify the victims. Authorities will use the same rapid analysis tool that identified victims of the deadly wildfire that devastated the Northern California town of Paradise last year, Santa Barbara County Sheriff Bill Brown said.
Brown said he had heard anecdotally that those who died ranged from teenagers to people in their 60s.
A broken-hearted mother said on her Facebook page Tuesday that her three daughters, their father and his wife were among those presumed dead.
Susana Rosas of Stockton, California, posted that her three daughters — Evan, Nicole and Angela Quitasol — were with their father Michael Quitasol and stepmother Fernisa Sison.
Evan Quitasol was a nurse at St. Joseph’s Medical Center of Stockton, where her father and Sison had worked after attending nursing school at San Joaquin Delta College.
Sison also worked at the college teaching first-year nursing students full-time in 2005 and 2006 and later as an adjunct instructor, according to the school’s spokesman, Alex Breitler.
“Everybody’s devastated. It’s a totally unexpected thing that happened,” said Dominic Selga, Sison’s ex-husband. “What caused the fire, that’s the big question, that’s what we all want to know.”
Rosas’ husband, Chris, told the Los Angeles Times that Nicole Quitasol worked as a bartender in Coronado near San Diego and her sister, Angela, was a science teacher at a middle school in Stockton.
Nicole worked for a Coronado restaurant called Nicky Rottens. A GoFundMe page the restaurant to help the family described Nicole as “an adventurous & loving soul.”
The fire broke out shortly after 3 a.m. Monday as the boat sat anchored in Platt’s Harbor off Santa Cruz Island, among the rugged, wind-swept isles that form Channel Islands National Park in the Pacific Ocean west of Los Angeles.
Those on board included students from Pacific Collegiate School in Santa Cruz, a public charter school for grades 7 through 12, the school said.
Scott Chan, a physics teacher at American High School in Fremont, also was aboard with his daughter, said Brian Killgore, a spokesman for the Fremont Unified School District. The district said in a statement that Chan taught Advance Placement physics classes for the past three years.
"[He] came in after working in industry and decided he wanted to really influence students' lives," said Fremont Unified Superintendent Kim Wallace, he was a "very well liked and a wonderful teacher."