Electricity was restored Monday afternoon to most areas of Oahu Community Correctional Center, the state’s largest jail, following an outage that began Friday afternoon.

The other areas are getting electricity from a backup generator, the Department of Public Safety said in a statement.

Prison officials said all of the cells and modules are secure.

However, the prison’s air-conditioning system is not connected to the generators.

“The health and well-being of our staff as well as the inmates are priorities that we take seriously,” said Nolan Espinda, public safety director, in a statement. “That is why we have been looking into alternatives to cool down the modules and help alleviate the heat as we figure out what caused the electrical outage. It is no secret that our facility is old. These kinds of problems will continue to happen until we can replace OCCC.”

An additional generator was being brought in Monday evening to power the air conditioning for the entire facility until full power is restored, the department said. To beat the heat, the staff has been allowing inmates to spend more time in the outside recreation yard.

Electrical contractors are working to fix the problem, the department said in a written statement.

Arraignments and pleas normally conducted by connecting the prison’s video system to the Circuit Court downtown had to be postponed until Thursday.

The Kalihi facility, built in 1975, was designed to hold 628 inmates but held nearly double that during the last week of December, according to the department. The facility has been modified to hold 954 beds, still not enough to accommodate the more than 1,150 who are housed there.