A satellite image shows the eye of Hurricane Ian approaching the southwest coast of Florida on Wednesday, September 28.

Photos: Hurricane Ian barrels into Florida

NOAA/AP

A satellite image shows the eye of Hurricane Ian approaching the southwest coast of Florida on Wednesday, September 28.

The streets of Naples, Florida, are flooded on Wednesday. City officials asked residents to <a href=shelter in place until further notice.” height=”1042″ src=”https://media.cnn.com/api/v1/images/stellar/prod/220928134456-14-hurricane-ian-0928-naples.jpg?c=original&q=w_480,c_fill”>

Photos: Hurricane Ian barrels into Florida

Naples Police

The streets of Naples, Florida, are flooded on Wednesday. City officials asked residents to shelter in place until further notice.

Sailboats anchored in Roberts Bay are blown around in Venice, Florida, on Wednesday.

Photos: Hurricane Ian barrels into Florida

Pedro Portal/El Nuevo Herald/TNS/Abaca/Reuters

Sailboats anchored in Roberts Bay are blown around in Venice, Florida, on Wednesday.

Melvin Phillips stands in the flooded basement of his mobile home in Stuart, Florida, on Wednesday.

Photos: Hurricane Ian barrels into Florida

Crystal Vander Weit/TCPalm/USA Today Network

Melvin Phillips stands in the flooded basement of his mobile home in Stuart, Florida, on Wednesday.

A man walks where <a href=water was receding from Tampa Bay due to a negative storm surge on Wednesday.” height=”1125″ src=”https://media.cnn.com/api/v1/images/stellar/prod/220928124900-09-hurricane-ian-0928-tampa.jpg?c=original&q=w_480,c_fill”>

Photos: Hurricane Ian barrels into Florida

Bryan R. Smith/AFP/Getty Images

A man walks where water was receding from Tampa Bay due to a negative storm surge on Wednesday.

Utility trucks are staged in a rural lot Wednesday in The Villages, a Florida retirement community.

Photos: Hurricane Ian barrels into Florida

Stephen M. Dowell/Orlando Sentinel/AP

Utility trucks are staged in a rural lot Wednesday in The Villages, a Florida retirement community.

Traffic lights are blown by strong gusts of wind in Fort Myers, Florida, on Wednesday.

Photos: Hurricane Ian barrels into Florida

Marco Bello/Reuters

Traffic lights are blown by strong gusts of wind in Fort Myers, Florida, on Wednesday.

Damage is seen at the Kings Point condos in Delray Beach, Florida, on Wednesday. <a href=Officials believe it was caused by a tornado fueled by Hurricane Ian.” height=”1265″ src=”https://media.cnn.com/api/v1/images/stellar/prod/220928095207-03-hurricane-ian-0928-dellray-beach.jpg?c=original&q=w_480,c_fill”>

Photos: Hurricane Ian barrels into Florida

Greg Lovett/The Palm Beach Post/USA Today Network

Damage is seen at the Kings Point condos in Delray Beach, Florida, on Wednesday. Officials believe it was caused by a tornado fueled by Hurricane Ian.

A TV crew broadcasts from the beach in Fort Myers on Wednesday.

Photos: Hurricane Ian barrels into Florida

Marco Bello/Reuters

A TV crew broadcasts from the beach in Fort Myers on Wednesday.

Highways in Tampa, Florida, are empty Wednesday ahead of Hurricane Ian making landfall. Several coastal counties in western Florida were under mandatory evacuations.

Photos: Hurricane Ian barrels into Florida

Shannon Stapleton/Reuters

Highways in Tampa, Florida, are empty Wednesday ahead of Hurricane Ian making landfall. Several coastal counties in western Florida were under mandatory evacuations.

An airplane is overturned in Pembroke Pines, Florida, on Wednesday.

Photos: Hurricane Ian barrels into Florida

Wilfredo Lee/AP

An airplane is overturned in Pembroke Pines, Florida, on Wednesday.

Zuram Rodriguez surveys the damage around her home in Davie, Florida, early on Wednesday.

Photos: Hurricane Ian barrels into Florida

Joe Cavaretta/South Florida Sun-Sentinel via AP

Zuram Rodriguez surveys the damage around her home in Davie, Florida, early on Wednesday.

People play dominoes by flashlight during a blackout in Havana, Cuba, on Wednesday. Crews in Cuba have been working to restore power for millions after the storm battered the western region with high winds and dangerous storm surge, <a href=causing an islandwide blackout.” height=”1953″ src=”https://media.cnn.com/api/v1/images/stellar/prod/220928043154-04-hurricane-ian-cuba-wednesday.jpg?c=original&q=w_480,c_fill”>

Photos: Hurricane Ian barrels into Florida

Ramon Espinosa/AP

People play dominoes by flashlight during a blackout in Havana, Cuba, on Wednesday. Crews in Cuba have been working to restore power for millions after the storm battered the western region with high winds and dangerous storm surge, causing an islandwide blackout.

Workers board up windows on the University of Tampa campus on Tuesday, September 27.

Photos: Hurricane Ian barrels into Florida

Chris O’Meara/AP

Workers board up windows on the University of Tampa campus on Tuesday, September 27.

People walk through a flooded street in Batabano, Cuba, on Tuesday.

Photos: Hurricane Ian barrels into Florida

Yamil Lage/AFP/Getty Images

People walk through a flooded street in Batabano, Cuba, on Tuesday.

Southwest Airlines passengers check in near a sign that shows canceled flights at the Tampa International Airport on Tuesday.

Photos: Hurricane Ian barrels into Florida

Chris O’Meara/AP

Southwest Airlines passengers check in near a sign that shows canceled flights at the Tampa International Airport on Tuesday.

Maria Llonch retrieves belongings from her home in Pinar del Rio, Cuba, on Tuesday.

Photos: Hurricane Ian barrels into Florida

Ramon Espinosa/AP

Maria Llonch retrieves belongings from her home in Pinar del Rio, Cuba, on Tuesday.

Traffic builds along Interstate 4 in Tampa on Tuesday.

Photos: Hurricane Ian barrels into Florida

Willie J. Allen Jr./Orlando Sentinel via AP

Traffic builds along Interstate 4 in Tampa on Tuesday.

A man carries his children through rain and debris in Pinar del Rio on Tuesday.

Photos: Hurricane Ian barrels into Florida

Alexandre Meneghini/Reuters

A man carries his children through rain and debris in Pinar del Rio on Tuesday.

People drive through debris in Pinar del Rio on Tuesday.

Photos: Hurricane Ian barrels into Florida

Alexandre Meneghini/Reuters

People drive through debris in Pinar del Rio on Tuesday.

Frederic and Mary Herodet board up their Gulf Bistro restaurant in St. Pete Beach, Florida, on Tuesday.

Photos: Hurricane Ian barrels into Florida

Joe Raedle/Getty Images

Frederic and Mary Herodet board up their Gulf Bistro restaurant in St. Pete Beach, Florida, on Tuesday.

People stand outside a flooded warehouse in Batabano on Tuesday.

Photos: Hurricane Ian barrels into Florida

Yamil Lage/AFP/Getty Images

People stand outside a flooded warehouse in Batabano on Tuesday.

NASA's Artemis I rocket rolls back to the Vehicle Assembly Building at the Kennedy Space Center in Cape Canaveral, Florida, on Tuesday. The launch of the rocket was postponed due to the impending arrival of Hurricane Ian.

Photos: Hurricane Ian barrels into Florida

Jim Watson/AFP/Getty Images

NASA’s Artemis I rocket rolls back to the Vehicle Assembly Building at the Kennedy Space Center in Cape Canaveral, Florida, on Tuesday. The launch of the rocket was postponed due to the impending arrival of Hurricane Ian.

Hurricane Ian is seen from the International Space Station on Monday, September 26.

Photos: Hurricane Ian barrels into Florida

NASA via AP

Hurricane Ian is seen from the International Space Station on Monday, September 26.

Waves kick up along the shore of Batabano as <a href=Hurricane Ian reaches Cuba on Monday.” height=”1145″ src=”https://media.cnn.com/api/v1/images/stellar/prod/220927105959-07-storm-ian-gallery-update.jpg?c=original&q=w_480,c_fill”>

Photos: Hurricane Ian barrels into Florida

A Cuban family transports personal belongings to a safe place in the Fanguito neighborhood of Havana on Monday.

Photos: Hurricane Ian barrels into Florida

Yamil Lage/AFP/Getty Images

A Cuban family transports personal belongings to a safe place in the Fanguito neighborhood of Havana on Monday.

Local residents fill sandbags in Tampa on Monday to help protect their homes from flooding.

Photos: Hurricane Ian barrels into Florida

Shannon Stapleton/Reuters

Local residents fill sandbags in Tampa on Monday to help protect their homes from flooding.

A family carries a dog to a safe place in Batabano on Monday.

Photos: Hurricane Ian barrels into Florida

Adalberto Roque/AFP/Getty Images

A family carries a dog to a safe place in Batabano on Monday.

People wait in lines to fuel their vehicles at a Costco store in Orlando on Monday.

Photos: Hurricane Ian barrels into Florida

Phelan M. Ebenhack/AP

People wait in lines to fuel their vehicles at a Costco store in Orlando on Monday.

Ryan Copenhaver, manager of Siesta T's in Sarasota, Florida, installs hurricane panels over the store's windows on Monday.

Photos: Hurricane Ian barrels into Florida

Mike Lang/USA Today Network

Ryan Copenhaver, manager of Siesta T’s in Sarasota, Florida, installs hurricane panels over the store’s windows on Monday.

A woman takes photos while waves crash against a seawall in George Town, Grand Cayman, on Monday.

Photos: Hurricane Ian barrels into Florida

Kevin Morales/AP

A woman takes photos while waves crash against a seawall in George Town, Grand Cayman, on Monday.

A man helps pull small boats out of Cuba's Havana Bay on Monday.

Photos: Hurricane Ian barrels into Florida

Yamil Lage/AFP/Getty Imagaes

A man helps pull small boats out of Cuba’s Havana Bay on Monday.

Shelves are empty in a supermarket's water aisle in Kissimmee, Florida, on Monday.

Photos: Hurricane Ian barrels into Florida

Gregg Newton/AFP via Getty Images

Shelves are empty in a supermarket’s water aisle in Kissimmee, Florida, on Monday.

Cathie Perkins, emergency management director in Pinellas County, Florida, references a map on Monday that indicates where storm surges would impact the county. During a news conference, she urged anyone living in those areas to evacuate.

Photos: Hurricane Ian barrels into Florida

Martha Asencio-Rhine/Tampa Bay Times via ZUMA Press Wire

Cathie Perkins, emergency management director in Pinellas County, Florida, references a map on Monday that indicates where storm surges would impact the county. During a news conference, she urged anyone living in those areas to evacuate.

This satellite image, taken Monday at 1 p.m. ET, shows Hurricane Ian near Cuba.

Photos: Hurricane Ian barrels into Florida

NOAA/NASA

This satellite image, taken Monday at 1 p.m. ET, shows Hurricane Ian near Cuba.

Sarah Peterson fills sandbags in Fort Myers Beach, Florida, on Saturday, September 24.

Photos: Hurricane Ian barrels into Florida

Andrew West/USA Today Network

Sarah Peterson fills sandbags in Fort Myers Beach, Florida, on Saturday, September 24.

Besnik Bushati fills gas containers at a gas station in Naples on Saturday. The station had only premium gas that morning.

Photos: Hurricane Ian barrels into Florida

Andrew West/USA Today Network

Besnik Bushati fills gas containers at a gas station in Naples on Saturday. The station had only premium gas that morning.

Fort Myers Beach was already feeling the brunt of the storm’s powerful eyewall just after noon Wednesday. Frank Loni, an architect from California staying in the community, posted video from a building’s balcony of some of the flooding on the streets below.

“The storm surge is very significant. We’re seeing cars and boats float down the street. We’re seeing trees nearly bent in half,” Loni said. “There’s quite a bit of chaos on the streets.”

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Mandatory evacuations have been ordered for flood-prone areas on the coast, and the National Weather Service warned those who stayed behind to move to upper floors in case of rising water levels.

“This is a powerful storm that should be treated like you would treat” a tornado approaching your home, Gov. Ron DeSantis said around 8 a.m.

Images showed extensive flooding in coastal neighborhoods in Naples, where officials asked residents to shelter in place until further notice.

In some areas, such as Charlotte County, Florida, 911 response teams have stopped emergency service due to the high winds and dangerous conditions. Sarasota Mayor Eric Arroyo said on CNN’s “At This Hour” that police officers were being taken off the streets due to the wind speeds and hazardous conditions.

“It is too late to evacuate at this point,” Arroyo said.

Ian poses several major dangers:

• Storm surge: Some 12 to 18 feet of seawater pushed onto land was predicted Wednesday for the coastal Fort Myers area, from Englewood to Bonita Beach, forecasters said. Only slightly less is forecast for a stretch from Bonita Beach down to near the Everglades (8 to 12 feet), and from near Bradenton to Englewood (6 to 10 feet), forecasters said.

Lower – but still life-threatening – surge is possible elsewhere, including north of Tampa and along Florida’s northeast coast near Jacksonville.

• Winds: Southwest Florida is facing “catastrophic wind damage.” Winds near the core of Hurricane Ian could exceed 150 mph, with gusts up to 190 mph, the hurricane center said. Multiple locations, including Sanibel Island, already have recorded wind gusts above 100 mph.

Ian is expected to retain hurricane strength for some time as it crosses the peninsula, with hurricane warnings issued for not only southwest Florida but also much of central Florida from coast to coast.

• Flooding rain: Because the storm is expected to slow down, 12 to 24 inches of rain could fall in central and northeastern Florida – including Tampa, Orlando and Jacksonville. That makes for a top-of-scale risk for flooding rainfall across this area.

Prior to nearing Florida, Hurricane Ian pummeled Cuba on Tuesday, leaving at least two dead and an islandwide blackout.

Since then, residents of Florida’s vulnerable Gulf Coast have been boarding up and leaving in droves on congested highways. More than 2.5 million people were advised to flee, including 1.75 million under mandatory evacuation orders – no small ask in a state with a large elderly population, some of whom have to be moved from long-term care centers.

Storm surge already was rising late Wednesday morning – more than 4.5 feet above normal highest tides was recorded before noon in Naples, already higher than the previous record there of 4.02 feet from Hurricane Irma in 2017.

After making landfall, Ian’s center is expected to move over central Florida through Thursday morning. Heavy rain and flooding also is possible in southern Florida, Georgia and coastal South Carolina.

Because Ian slowly approached land, the worst conditions could remain over some areas for eight or more hours.

“Widespread, life-threatening catastrophic flash, urban, and river flooding is expected” across central and southern Florida, the hurricane center said.

By late Thursday, Ian is due to emerge over the Atlantic Ocean, where it could strengthen again and affect another part of the US.

Parts of far southern Florida by early Wednesday morning had begun feeling the storm’s effects, with tropical storm-force winds and at least two possible tornadoes reported in Broward County, including at North Perry Airport, where planes and hangers were damaged. Major flooding was being reported in Key West due to storm surge, along with power outages.

Schools, supermarkets, theme parks, hospitals and airports had announced closures. The Navy moved its ships, and the Coast Guard has shut down ports. As winds pick up, gas stations may temporarily run out of fuel, DeSantis said.

Sarasota County Sheriff Deputies block the access to a downtown bridge over to the barrier islands as Hurricane Ian approaches Florida's Gulf Coast on September 28.

In Tampa, police went door to door Tuesday in a mandatory evacuation zone, making sure residents were ready to flee. Earlier projections had Ian on track to slam Tampa Bay, and even as the hurricane’s path shifted south, mandatory evacuations and preparations continued, Tampa Mayor Jane Castor said.

Law enforcement officials around the state warned that people who stayed behind in evacuation areas cannot expect rescuers to respond to calls for help during the storm when winds are high.

“If you call for help, once we pull (officers) off the road … we’re not coming. … We’re not putting people in peril when (others) didn’t heed the mandatory evacuation order,” Pinellas County Sheriff Bob Gualtieri said Wednesday.

Not everyone moved. Chelsye Napier, of Fort Myers, stayed home with her fiance and cats despite being in an evacuation zone, she told CNN Wednesday. They waited “because we don’t know anyone down here,” and ultimately decided to stay put, she said.

Ian’s winds could be catastrophic

Category 4: 130-156 mph

  • • Most of the area is uninhabitable for weeks or months.
  • • Power outages last weeks to months.
  • • Fallen trees and power poles isolate residential areas.
  • + Well-built framed homes sustain severe damage.
  • Category 5: 157+ mph

  • + A high percentage of framed homes are destroyed.
  • Source: National Hurricane Center

“If anything happens, we have everything that we need here. We’ve got food, we got water. We have everything that we need here,” she said. “So it’s all OK for right now. We’ll see, though, later on.”

Preparations across Florida have been underway for days as residents braced for Ian’s wrath. People lined up to pick up sandbags and flocked to stores to stock up on supplies like water and batteries.

And as the hurricane marched closer, the closures began.

Across Florida, 58 school districts have announced closures due to storm as campuses turned into shelters for evacuees. Disney World is set to close Wednesday and Thursday, as is Kennedy Space Center’s Visitor Complex. And hundreds of Publix grocery stores shut their doors Tuesday evening, expected to remain closed through Thursday.

As millions were told evacuate, 176 shelters opened statewide and hotels and Airbnbs opened to people leaving evacuation zones, DeSantis said.

Local governments and state agencies also prepared those living in nursing homes and other senior care facilities to evacuate.

Heather Danenhower, with Duke Energy, walks around utility trucks that are staged in a rural lot in The Villages of Sumter County on Wednesday.

Florida has around 6 million residents over the age of 60, according to the state’s Department of Elder Affairs – nearly 30% of its total population. As of Tuesday, all adult day cares, senior community cafes and transportation services in evacuation zones are closed, according to the department.

Authorities also readied services to fan out and respond to calls for rescue and then, in the aftermath of the hurricane, for recovery and repair efforts.

Nearly 400 ambulances, buses and support vehicles were responding to areas where the hurricane was expected to make landfall, according to the governor’s office.

DeSantis activated 5,000 Florida National Guard members for Ian’s response operations, and 2,000 more guardsmen from Tennessee, Georgia and North Carolina were being activated to assist.

Florida urban search and rescue teams also were prepping.

“We have five state teams that are activated with additional five FEMA teams that are in play,” Florida Chief Financial Officer Jimmy Patronis said at a news conference Tuesday night. “We have over 600 resources to bear in addition to these out-of-town teams.”