FRESNO, Calif., July 27 —A searing heat wave in its second week has been responsible for more than 100 deaths across California, the authorities said, with the coroner’s office here forced to double-stack bodies.

Most of the deaths were reported in the land-locked Central Valley, the agricultural spine of the state where triple-digit temperatures have been the norm. At least 22 deaths in Fresno County, where funeral homes have offered to help with the backlog at the coroner’s office, have been linked to the heat.

“We’re just trying to catch up,” said Joseph Tiger, a deputy coroner in Fresno. “I have been here 10 years and I have never seen it this bad. Our boss has been here over 20 and he hasn’t seen it this bad either. For the last two weeks it has just been unbearable hot.”

The governor’s Office of Emergency Services said that statewide 53 of the people were confirmed dead by coroners as a result of the heat; the others were presumed to have died from heat-related causes pending autopsies, said Roni Java, a spokeswoman for the office.