In one instance, a patient was described as “resting in bed” with “even and unlabored” breathing when the patient was already dead, a state report said. Nursing home officials have said they tried to alert state authorities and the power company that they needed help restoring the air-conditioning system — and got none. More than 100 patients were transferred from the nursing home to hospitals.

The governor criticized the home for not calling 911 until residents were suffering respiratory distress, and in some cases were near death. A lawyer for the nursing home responded that patients were constantly monitored and that there was no reason to call 911 before they actually became ill.

[Read more about what happened at the nursing home.]

David Frankel, a lawyer for the charge nurse, said he believed his client would be charged with 12 counts of manslaughter. The other lawyers said they had not been told what charges would be filed, but they expected manslaughter to be among them.

The Hollywood Police Department did not return a call seeking comment on Saturday.

Jim Cobb, a lawyer for Mr. Carballo said he was outraged by the planned charges. He said the police were going after people who were trying to help in the days after the hurricane devastated Caribbean islands and resulted in the deaths of 129 people, according to the National Hurricane Center.

“It’s the government scapegoating and going as far down the food chain as they can possibly go to absolve themselves of the problems that were caused,” Mr. Cobb said. “This is just wrong.”