Hurricane Irma's fierce winds ripped into the northern coast of Cuba Friday night as massive storm edged closer to landfall as a Category 5 storm in the Florida Keys.
Irma, which has sustained winds of 155 mph, has left a trail of devastation and death in much of the Caribbean as it advanced toward South Florida.
Forecasters with the National Hurricane Center say the storm's wind speeds will increase after Irma passes Cuba then slips into the extremely warm waters near the Keys.
Irma is expected to have sustained winds of 160 mph and once again be a Category 5 hurricane by the time it makes US landfall on Sunday.
"Nowhere in the Florida Keys will be safe," the National Weather Service tweeted.
There were worries the storm's most powerful winds, on the northeastern side of the core, could pummel Miami, but it appears the city will avoid a direct hit, while still getting pounded by strong winds, storm surge and heavy rains.
At least 24 people were killed this week when Irma pummeled northern Caribbean islands such as Barbuda and the Virgin Islands. In Puerto Rico, hundreds of thousands of people -- nearly 70% of the US territory's utility customers -- were left without power, the governor's office said.
Irma slammed the Turks and Caicos and southeastern Bahamas early Friday before it was off to pound northern Cuba and the central Bahamas.
Irma is expected be near the Florida Keys and South Florida by early Sunday, and many residents there have moved inland or to shelters. Many counties are under evacuation orders.
"If you have been ordered to evacuate, leave now. Not tonight, not in an hour, now," Gov. Rick Scott said Friday in a 7 p.m. news conference. Staying in homes could subject residents to storm surge as high as 12 feet, the governor added.
Forecasters have advised that the storm's potential path could change and residents should realize that most of Florida will feel the storm's impact.
At its peak, a then-Category 5 Irma sustained maximum wind speeds of at least 185 mph for longer (37 hours) than any storm on record. The Red Cross estimates 1.2 million people have already been battered by the storm.
Tracking Hurricane Irma's path
Here are the latest developments
-- Around 8 p.m. ET, Irma's center was about 150 miles east of Caibarien, Cuba, moving west with maximum sustained winds of 155 mph. Hurricane-force winds could be felt as far as 70 miles from the center.
A day-by-day look at Hurricane Irma's path ahead
-- Conditions on the northern coast of Cuba deteriorated rapidly Friday evening, CNN's Patrick Oppmann reported from Caibarien. As rain flew sideways, visibility plummeted and it was impossible to travel. Oppmann reported many Cubans evacuated but some were staying in their homes, protecting their belongings. Then an hour later, there was a break between the bands of rain and the trees stopped swaying.
-- Irma led to at least 24 deaths in the Caribbean, including nine in unspecified French territories, one on Barbuda, one at the British overseas territory of Anguilla, two in Dutch-administered St. Maarten, four in the British Virgin Islands, four on the US Virgin Islands, and three in Puerto Rico. Officials didn't specify which French Caribbean territories had nine deaths but earlier indicated some had been on the island of St. Martin.
-- The three deaths in Puerto Rico were at least loosely linked to Irma. One person died from a fall while being taken to a shelter; another was killed in a car crash; a third died of electrocution, the governor said.
-- In the British Virgin Islands, "roads are impassable, and there is currently no access to some areas," Gov. Gus Jaspert said.
-- Hurricane warnings are in effect for parts of central Cuba, and the southeastern, central and northwestern Bahamas. Hurricane warnings also are in effect from Sebastian Inlet on the east coast, southward around the Florida Peninsula to Anna Maria Island on the panhandle. The warning includes the Florida Keys, Lake Okeechobee and Florida Bay.
-- The Red Cross said as many as 26 million people could be exposed to destructive winds and torrential rain just in the Dominican Republic, Haiti and Cuba.
Hurricane Irma victims need your help
-- Irma could overwhelm parts of the Bahamas, a nation of about 390,000, with storm surges of up to 20 feet -- well above the islands' elevation, CNN meteorologist Chad Myers said.
Florida and the Southeast prepare for Irma
The National Hurricane Center has warned Irma could "landfall in Florida as a dangerous major hurricane, and will bring life-threatening wind impacts to much of the state regardless of the exact track of the center."
There could be storm surges up to 12 feet in coastal areas, which could "inundate so many low-level houses, especially on the Keys," Myers said.
US and European forecast models predict the eye could strike the Keys and then the Everglades, west of Miami, on Saturday night into Sunday morning.
"It's not a question of whether Florida is going to be impacted -- it's a question of how bad Florida is going to be impacted," Federal Emergency Management Agency Administrator Brock Long said Friday, urging people to heed evacuation orders.
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Though the core has the most power, Irma is huge; winds of at least tropical-storm force cover 70,000 square miles -- larger than the area of Florida (65,000 square miles). At some point this weekend, the entire state could see at least hurricane-force gusts of 74 mph and above, CNN's Myers said.
In Miami-Dade County alone, about 660,000 of its 2.6 million population have been asked to evacuate, Mayor Carlos Gimenez said.
Farther north, on Daytona Beach, Michael Hanna was itching to leave Friday morning but first had to board up his beach apparel store.
"I stayed a little longer than anybody else so I can cover up my business," he said. "My kids are panicking; my wife, she's panicking. ... (Saturday) by 6 a.m., 7 a.m., we're going to be on the road, heading to Georgia."
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Irma could cause power outages for weeks in parts of South Florida, and more than 4.1 million customers -- or 9 million people -- could be affected by outages at some point, Florida Power and Light Co. said. "Our crews will likely have to rebuild parts of the system," the utility said.
Evacuees stocked up on supplies, waited for hours at gas stations and sat through massive traffic jams.
People also flocked to South Florida airports, but schedules were in flux. More than half of Friday's flights were canceled at Miami International Airport, and "most of the airlines will suspend flights after (Friday) through Monday, depending on the condition of the airport," spokesman Greg Chin said.
Florida is not the only state preparing for possible impact. Long, the FEMA administrator, said people from Alabama to North Carolina should watch the storm.
Georgia's Gov. Nathan Deal declared a state of emergency for 30 counties and has ordered evacuations for coastal areas east of Interstate 95, including Savannah, starting Saturday. The governors of North and South Carolina also declared states of emergency.
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Devastation to islands
Irma brought heavy rain and powerful winds Thursday night and Friday morning to the low-lying Turks and Caicos Islands.
Residents of the islands, a British overseas territory with about 35,000 people, were told to stay put.
Desmond Piccolo Henry took shelter in his concrete home with his wife and a friend on one of the islands, Providenciales, as the storm rocked the area early Friday.
"It's a concrete house, but trust me, it was shaking. My friend was saying, 'Oh my God, I think God is coming, why are we going through this?' "
Henry's home survived with just a few shingles lost, but people have told him that roofs were torn off nearby and debris crushed some cars. Video he posted to Facebook showed downed tree limbs and other destruction.
The capital island of Grand Turk suffered "quite a bit of damage" Thursday night, including to part of a hospital's roof, Gov. John Freeman told CNN.
After Irma, Hurricane Jose looms
The Caribbean islands already pummeled by Irma have begun assessing the damage, finding shredded buildings, battered cars and streets submerged in water.
Barbuda, one of two major islands in the nation of Antigua and Barbuda, is barely habitable, with about 95% of its buildings damaged, Prime Minister Gaston Browne said.
Browne estimated the damage will cost $100 million to fix on the island of 1,800 residents.
"It looks like (a) garbage disposal," Marlon Carr, a photographer who toured the island with Browne, told CNN on Thursday. "There was rubble and roof galvanized all over the island. It looked like some of the houses ... were imploded on."
Irma's eye passed directly over Barbuda on Wednesday, and now the northeastern Caribbean nation is anxiously watching Hurricane Jose to the east, which has strengthened to a Category 4 storm.
Anguilla, Barbuda, St. Martin and St. Barts are under a hurricane warning for Jose, which could pass close to those islands Saturday. The government called for voluntary evacuations from Barbuda, Browne said.
Irma also badly hit St. Martin with about 50 people reported injured.
Dutch Prime Minister Mark Rutte described the looting situation in St. Maarten, the Dutch portion of the island, as serious, a spokesman for his office said Friday.
The government said emergency flights delivering water and other supplies to the island will be used to take residents and visitors off it.
"Our worst fears have played out in Barbuda and elsewhere," said Walter Cotte, regional director for the Americas for the Red Cross. "We can't yet assess the full extent of damage, but we expect that the Red Cross will be delivering extensive support to many thousands over the coming weeks and months."
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CORRECTION: An earlier version of this story gave incorrect peak wind speeds for Hurricane Irma. At its strongest, sustained winds reached 185 mph.
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