Irma, categorised as one of the most powerful Atlantic storms on record when it rampaged through the Caribbean, has killed at least 77 people, including 36 in the United States, officials said. It has also led to almost 150 patients being taken to local hospitals.
The chief said authorities have not ruled anything out in the deaths, including carbon monoxide poisoning from generators.
Hurricane Andrew caused a diaspora of nursing home residents, and family members frantically searched to locate their elderly relatives. He added that calls to Florida Power & Light had not been returned.
Broward County had said it did not label the nursing home as "critical" infrastructure based on a Florida Power and Light guidance document suggesting that these facilities are "non-critical, but play a decisive role in community recovery after a serious event", the county said in its statement.
Memorial Regional Hospital began receiving patients early yesterday, said Dr Randy Katz, medical director of the hospital's emergency department.
Through a representative, Carballo told the SunSentinel newspaper that the home has a backup generator but that it does not power the air conditioning. County officials said calls for help started coming in beginning at 4 a.m., and that most came from within the facility itself.
The facility said an official with its parent company made calls on Monday and Tuesday to several state agencies to report the problem.
A third 911 call came in for yet another patient transport - this time prompting the fire department to send more crews to the nursing home to investigate.
At the Hollywood nursing home, Jean Lindor, a kitchen worker, said through a Haitian Creole translator that the air conditioner had not been working since the storm and it had been hot inside.
Sanchez said police have opened a criminal investigation into the deaths.
She said some of the 15,000 residents at Century Village were vulnerable and "we are concerned about their welfare".
The nursing home has had a list of safety violations and citations, including two for not following generator regulations in 2014 and 2016. In both instances, the nursing home corrected these deficiencies.
The storm, which has claimed more than two dozen lives in the U.S., struck southwestern Florida on Sunday morning as a category four hurricane before weakening to a tropical depression on Monday. Over the course of Wednesday, the death toll rose to eight, with the deceased ranging in age from 71 to 99. Its emergency room doctors and staff were ready to help.
The complaint alleges that as early as Sunday, the center became aware that its air conditioning equipment had "ceased to operate effectively and appropriately". Gov. Rick Scott ordered a moratorium on admissions at the nursing home. Exactly how the deaths happened was under investigation. What they found was an oven.
"We are directing a criminal examination (and) not precluding anything as of now", Sanchez said at a question and answer session Wednesday. And Hurricane Harvey washed through La Vita Bella assisted living facility, and brought a viral photo of elderly women sitting in deep floodwaters while they awaited rescue.
"We're certainly all very disappointed that something like this could've taken place", Mayor Josh Levy told CNN.