Police say rescue crews were called to the nursing home just after 4:00 a.m. Wednesday morning.
Keefe said about one-third of Broward County was still without power.
Miami-Dade County Mayor Carlos Gimenez said officials were providing ice to 27 senior residence facilities still without power, local media reported.
"That's what we do", he said. "We are fully cooperating with all authorities and regulators to assess what went wrong and to ensure our other residents are cared for". He said the building has been sealed off for the criminal investigation but did not give further details.
Jeff Nova, whose 71-year-old mother Gail Nova was among the deceased, said he didn't have any information about what happened. "I told the man (who installed the shower), I told him, 'If the hurricane takes the rest of my house, I want this shower sticking up out of that slab like the last tooth in the mouth of a bum".
One of the patients died during the evacuation, two were pronounced dead at a hospital, and three were found in the nursing home on September 13. Police opened a criminal investigation Wednesday into the deaths.
In his latest statement, Carballo attempted to clarify some of the outstanding questions.
How did eight people die in the aftermath of Hurricane Irma?
Customers who lost electricity on Florida's eastern side will likely have it restored by this weekend, because fewer electrical poles came down than in other parts of the state, Florida Power & Light Co. says. The state, too, has its own lousy record of regulation.
The temperature in Hollywood for Wednesday is expected to get up to 88 degrees with 74% humidity. The Florida Health Care Association, a nursing-home industry group, said Wednesday morning that about 150 of almost 700 nursing facilities in the state do not have electricity fully restored.
Moulder said her 93-year-old mother, Bertha Aguiar, suffers from Alzheimer's disease and has been stressed since she was evacuated from the nursing home. Hollywood spokeswoman Raelin Story said there were "a number of critical patients". After the third call, even the fire department knew something was terribly wrong. "It was very hot on the second floor". Why weren't people evacuated?
A total of 133 patients were evacuated, 118 were medical patients at the Rehabilitation Center and 18 were patients at the center's behavioral wing.
But most of the survivors were treated for "respiratory distress, dehydration and heat-related issues", Memorial Regional Hospital's emergency medical director, Dr.
"This whole thing had an effect on her nerves", Moulder said.
Apparently, the center was in contact with the state Department of Health after Irma.
They do not, however, represent the Rehabilitation Center at Hollywood Hills.
The nursing home deaths were reported Wednesday in Hollywood, three days after Irma made landfall in the Florida Keys and left millions statewide without power.
Governor Rick Scott called the tragedy "unfathomable" and vowed to "aggressively demand answers".
"If they find that this facility was not meeting the state's high standards of care, they will be held accountable to the fullest extent of the law", Scott's statement said.
"Did the system break down somewhere between the nursing home itself and the power company and emergency operations folks?"
The incident raised concerns about the welfare of residents at other nursing centers.
All nursing home facilities are required to have an emergency management plan.
Assisted living facilities across the state serve an additional 92,000 residents.
With millions of people in Florida still lacking power, officials are urging those who need a break from the heat to visit cooling centers and drink water.
Employees of the facility told reporters their power had been knocked out during Hurricane Irma, and that they were using a generator to cook meals but not for air conditioning.