Two found dead in utility vault during Fresno bridge smoke investigation

Smoke near the H Street overpass turned into a deadly discovery Monday morning when Fresno firefighters found two people dead inside a utility vault beneath the bridge, a confined electrical chamber that powers much of downtown Fresno.

Firefighters were dispatched shortly after 8:20 a.m. on May 11 after smoke was reported at the H Street and Fresno Street bridge area. When crews reached the scene, they traced the smoke to the underground vault and immediately called in the Fresno Fire Department’s Urban Search and Rescue Team, Hazardous Materials Team and emergency medical personnel because the space contained live electrical equipment, Fire Chief Billy Alcorn said. Pacific Gas and Electric Company crews shut off power before firefighters entered through an access hatch.

The vault served as a major electrical distribution circuit for downtown Fresno, and the outage cut power to multiple city blocks while crews worked. Nearby residents, including people at Matsen Towers, were left without electricity. One resident said the loss of power was especially troubling as temperatures were already rising, adding another layer of concern to a scene that already drew a heavy emergency response in the heart of downtown.

Inside the vault, crews found two deceased individuals. Their identities had not been released as of Monday afternoon, and the Fresno County Sheriff-Coroner’s Office and fire investigators were still working to identify them and determine how the fire started. Officials have not said what ignited the smoke, and they have not released a timeline for when the vault became accessible to the public.

What investigators described raises a larger public-safety question for downtown Fresno: how an underground electrical vault, never intended for side access, became reachable in the first place. Construction workers told firefighters they had seen homeless individuals entering the vault earlier that morning. Investigators later said the underground area may have been converted into a makeshift homeless encampment that had existed for months, reached through a tunnel dug beneath the dirt near the overpass.

The incident unfolded beside major California High-Speed Rail construction in downtown Fresno, where rail work and grade separations continue to reshape the corridor. The California High-Speed Rail Authority says Fresno Station is planned for H Street between Fresno and Tulare, placing the fatal fire within one of the city’s most heavily watched construction zones and raising immediate questions about site security, utility access and the vulnerabilities hidden beneath downtown streets.