More than two dozen critically ill patients were evacuated from a Los Angeles hospital on Monday night after a power outage disrupted care, the authorities said. It was unclear whether the disruption was connected to the effects of Tropical Storm Hilary, which pummeled Southern California over the weekend.

The power outage was reported at Adventist Health White Memorial, in East Los Angeles, at 11:45 p.m. local time, Margaret Stewart, a spokeswoman for the Los Angeles Fire Department, said early Tuesday.

The Fire Department worked with the hospital’s staff to identify which critically ill patients would require transportation, beginning with those on ventilators, Ms. Stewart said.

The hospital was caring for 241 patients at the time, 28 of whom were in critical care and were taken to other hospitals in the area, Chief Kristin Crowley of the Los Angeles Fire Department said at a news conference on Tuesday morning.