Blaze That Killed Vincent Perez and Anthony Valerio, S.F. Firefighters, Was an Accident

It was a sad accident

​Fire officials have determined that the blaze that killed Vicent Perez and Anthony Valerio was an electrical accident. The Fire Department is still conducting a test of the house's electrical system to pinpoint the cause of the massive fire that scorched a Diamond Heights home on June 2.

The fire started one floor below grade of the four-story home on 133 Berkeley Way. More than 30 firefighters tried to extinguish the fire. Valerio and Perez were inside the home when a "flashover" occurred, meaning temperatures rose so much that everything ignited at once.

Fire officials outside lost radio contact with the two. When they went inside to look for them, they saw both firefighters on the ground, badly burned and unconscious. Perez died an hour later and Valerio died a few days later.

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