A nursing home official, who requested anonymity because the investigation was continuing, said that the administrator, Jorge Carballo, who is not a clinician, reported that all the patients had been checked by around 11 p.m. on Tuesday. The patients’ temperatures were taken every eight hours, and there were no reports that any were outside of expected ranges.

The Agency for Health Care Administration said the responsibility for the loss of life ultimately belonged to the nursing home.

“Let’s be clear — this facility is located across the street from one of Florida’s largest hospitals, which never lost power and had fully operating facilities,” Mallory McManus, the agency’s communications director, wrote in an email. “It is 100 percent the responsibility of health care professionals to preserve life by acting in the best interest of the health and well-being of their patients.”

Florida Power & Light declined to comment on the nursing home’s account, citing the ongoing investigations. On Wednesday, it released a statement saying that it had been emphasizing to customers that those with electricity-dependent medical needs should call 911 if they are in a life-threatening situation.

The utility also said the nursing home was not on its highest priority list for restoring power, and said that the decision had been made in coordination with county officials. “Other critical facilities, such as hospitals and 911 centers, were identified as higher priorities,” it said.

But Broward County previously said that it prioritized its facilities based on a guidance document from the utility, which categorizes nursing homes as “noncritical.” The utility declined to release the guidance document “due to security and customer privacy concerns.”

The county said that it had asked the power company to escalate the Rehabilitation Center on its priority list after the county’s emergency operations center received a call from the home on Tuesday morning. The Broward mayor, Barbara Sharief, asked executives from the power company to consider all the nursing homes and senior communities in the “critical” category, but was told there were too many to do so. The county said it was not aware of the emergency situation at the Rehabilitation Center.