(CNN) Editor's note: This is a developing story that is being constantly updated as the storm progresses. Also, follow our live updates here or watch unlimited CNN .

Powerful winds from Hurricane Irma whipped through southwest Florida on Sunday, downing power lines and leaving a trail of debris behind.

Forecasters warned people in the hurricane's path to prepare for "dangerous storm surges" and flash flooding.

Now a Category 2 storm with maximum sustained winds of 105 mph, Hurricane Irma is about 50 miles east-northeast of Fort Myers, Florida, moving north at 14 mph.

Irma is already uprooting trees and turning streets into rivers.

And there's plenty more to come as the storm climbs the coast toward Tampa.

Photos: Hurricane Irma slams Florida Children clean a dirty mattress from a flooded home in Immokalee, Florida, on Thursday, September 14. Hurricane Irma laid waste to beautiful Caribbean islands and caused historic destruction across Florida. The cleanup will take weeks; recovery will take months. Hide Caption 1 of 58 Photos: Hurricane Irma slams Florida On September 14, President Donald Trump, Vice President Mike Pence and first lady Melania Trump hand out food to people impacted by Hurricane Irma in Naples, Florida. Hide Caption 2 of 58 Photos: Hurricane Irma slams Florida Debris litters the area around a group of homes in the Florida Keys on Wednesday, September 13. Hide Caption 3 of 58 Photos: Hurricane Irma slams Florida Lake County jail inmates fill sandbags in Astor, Florida, on September 13. Hide Caption 4 of 58 Photos: Hurricane Irma slams Florida A classic Volkswagen sits in floodwaters September 13 in Middleburg, Florida. Flooding from the Black Creek topped the previous high-water mark by about 7 feet. Hide Caption 5 of 58 Photos: Hurricane Irma slams Florida James Wade checks for water-damaged items as floodwaters recede in Middleburg on September 13. Hide Caption 6 of 58 Photos: Hurricane Irma slams Florida Floodwaters surround vehicles in Callahan, Florida, on Tuesday, September 12. Hide Caption 7 of 58 Photos: Hurricane Irma slams Florida Jose Encarnacion pulls a chicken from a cage as he gathers belongings from his flooded house in Bonita Springs, Florida, on September 12. Hide Caption 8 of 58 Photos: Hurricane Irma slams Florida Joseph Dupuis III stacks boxes off the floor in his parents' water-logged apartment in Jacksonville, Florida, on September 12. Hide Caption 9 of 58 Photos: Hurricane Irma slams Florida Motorists in Estero, Florida, fill gas cans September 12, moments before police shut the station down because of a curfew. Hide Caption 10 of 58 Photos: Hurricane Irma slams Florida Mike Gilbert and his daughter Brooke embrace in front of a relative's destroyed condominium building in the Florida Keys on September 12. Hide Caption 11 of 58 Photos: Hurricane Irma slams Florida Members of the US Coast Guard operate in floodwaters during rescue missions in Hastings, Florida, on September 12. Hide Caption 12 of 58 Photos: Hurricane Irma slams Florida Waist-deep in floodwater, Shelly Hughes gets her first look at the inside of her camper in Arcadia, Florida, on September 12. Hide Caption 13 of 58 Photos: Hurricane Irma slams Florida In the aftermath of Hurricane Irma, a house slides into the Atlantic Ocean in Ponte Vedra Beach, Florida, on Monday, September 11. Hide Caption 14 of 58 Photos: Hurricane Irma slams Florida Richard Shieldhouse maneuvers through storm-surge floodwaters in Jacksonville on September 11. Hide Caption 15 of 58 Photos: Hurricane Irma slams Florida Mario Valentine sits in his badly damaged home in Immokalee on September 11. Hide Caption 16 of 58 Photos: Hurricane Irma slams Florida Boats are partially submerged in Key Largo, Florida, on September 11. Hide Caption 17 of 58 Photos: Hurricane Irma slams Florida Chris Stokes works in the mud as he helps clean up damage to his father's convenience store in Everglades City, Florida, on September 11. Hide Caption 18 of 58 Photos: Hurricane Irma slams Florida Ashley Tomberg drags a tree branch from the roof of a neighbor's house in Gainesville, Florida, on September 11. Hide Caption 19 of 58 Photos: Hurricane Irma slams Florida Floodwaters inundate a car in Jacksonville on September 11. Hide Caption 20 of 58 Photos: Hurricane Irma slams Florida A crocodile appears at the Dinner Key Marina in Miami on September 11. Hide Caption 21 of 58 Photos: Hurricane Irma slams Florida John Duke tries to salvage his flooded vehicle in Jacksonville on September 11. Hide Caption 22 of 58 Photos: Hurricane Irma slams Florida A van sits in a sinkhole that opened up in Winter Springs, Florida, on September 11. Hide Caption 23 of 58 Photos: Hurricane Irma slams Florida People check out floodwaters at Jacksonville's Memorial Park on September 11. Hide Caption 24 of 58 Photos: Hurricane Irma slams Florida Kelly McClenthen and her boyfriend, Daniel Harrison, walk through floodwaters in Bonita Springs on September 11. Hide Caption 25 of 58 Photos: Hurricane Irma slams Florida A truck drives through a flooded street in Key Largo on September 11. Hide Caption 26 of 58 Photos: Hurricane Irma slams Florida A man walks by damage in Palm Shores, Florida, on September 11. Hide Caption 27 of 58 Photos: Hurricane Irma slams Florida Catharine Taylor Woods cleans up a broken awning outside her building in Wauchula, Florida, on September 11. Hide Caption 28 of 58 Photos: Hurricane Irma slams Florida The roof of a home is damaged in Marco Island, Florida, on September 11. Hide Caption 29 of 58 Photos: Hurricane Irma slams Florida Rick Freedman checks damage to his neighbor's home in Marco Island on September 11. Hide Caption 30 of 58 Photos: Hurricane Irma slams Florida Boats are partially submerged in a marina in downtown Miami on September 11. Hide Caption 31 of 58 Photos: Hurricane Irma slams Florida People step out of their flooded home in Fort Myers, Florida, on September 11. Hide Caption 32 of 58 Photos: Hurricane Irma slams Florida A felled tree blocks a street in downtown Miami on September 11. Hide Caption 33 of 58 Photos: Hurricane Irma slams Florida Irma damaged this gas station roof in Bonita Springs. Hide Caption 34 of 58 Photos: Hurricane Irma slams Florida Michele Snelling sleeps on couch cushions next to her 4-month-old daughter, Lauryn, at a middle school in St. Petersburg, Florida, on September 11. The school was filled with evacuees. Hide Caption 35 of 58 Photos: Hurricane Irma slams Florida Hotel guests navigate a dark stairwell after they lost power in Fort Lauderdale, Florida. Hide Caption 36 of 58 Photos: Hurricane Irma slams Florida People in Cape Coral, Florida, tend to a car that flipped over during Hurricane Irma on Sunday, September 10. Hide Caption 37 of 58 Photos: Hurricane Irma slams Florida A manatee lies stranded September 10 after waters receded during Irma's approach in Manatee County, Florida. Hide Caption 38 of 58 Photos: Hurricane Irma slams Florida High winds split this large tree in half in Fort Lauderdale. Hide Caption 39 of 58 Photos: Hurricane Irma slams Florida An American flag is torn as Irma passes through Naples on September 10. Hide Caption 40 of 58 Photos: Hurricane Irma slams Florida A sheriff's deputy walks through a shelter in Naples after the power went out on September 10. Hide Caption 41 of 58 Photos: Hurricane Irma slams Florida A police officer walks over debris after a tornado touched down in Palm Bay, Florida, on September 10. Hide Caption 42 of 58 Photos: Hurricane Irma slams Florida Yaya Lopez holds her fiance, Howard Lopez, while they sleep in a middle-school hallway in St. Petersburg on September 10. Hide Caption 43 of 58 Photos: Hurricane Irma slams Florida Geoff Rutland, a local volunteer from Crossing Jordan Church, helps other residents get ice from a vending machine in Tampa, Florida, on September 10. Hide Caption 44 of 58 Photos: Hurricane Irma slams Florida PJ Pike checks on his boat and one belonging to a friend in Fort Myers. Both were sitting in mud at their moorings due to an unusually low tide on September 10. Hide Caption 45 of 58 Photos: Hurricane Irma slams Florida People walk past a building in Miami where the roof was blown off by Hurricane Irma on September 10. Hide Caption 46 of 58 Photos: Hurricane Irma slams Florida An abandoned car sits in floodwaters during a storm surge in Fort Lauderdale on September 10. Hide Caption 47 of 58 Photos: Hurricane Irma slams Florida Fallen trees block a parking lot in Fort Lauderdale on September 10. Hide Caption 48 of 58 Photos: Hurricane Irma slams Florida Sailboats moored near Watson Island ride out the winds and waves on September 10. Hide Caption 49 of 58 Photos: Hurricane Irma slams Florida Members of the Blinckman family use their personal devices in a stairwell utility closet as Hurricane Irma went over Key West, Florida, on September 10. Hide Caption 50 of 58 Photos: Hurricane Irma slams Florida Evacuees watch the weather from a shelter in Naples on September 10. Hide Caption 51 of 58 Photos: Hurricane Irma slams Florida Heavy winds and rain blow through Miami on September 10. Hide Caption 52 of 58 Photos: Hurricane Irma slams Florida Weather Channel meteorologist Mike Seidel fights fierce winds and flooded streets while reporting in Miami on September 10. Hide Caption 53 of 58 Photos: Hurricane Irma slams Florida A man records the gusty winds going through downtown Miami on September 10. Hide Caption 54 of 58 Photos: Hurricane Irma slams Florida A tree lies on a pickup truck after being knocked down by the high winds in Miami on September 10. Hide Caption 55 of 58 Photos: Hurricane Irma slams Florida Hotel guests eat breakfast by lamplight after the Courtyard Marriott was left without power in Fort Lauderdale on September 10. Hide Caption 56 of 58 Photos: Hurricane Irma slams Florida Part of this crane tower collapsed in Miami on September 10. Hide Caption 57 of 58 Photos: Hurricane Irma slams Florida People sit in the Miami-Dade County Fair Expo Center as Irma approached Miami on Saturday, September 9. See Hurricane Irma's impact on the Caribbean Hide Caption 58 of 58

"We're all hanging in there, ready to get out there to help others as soon as it's safe to do so," Marco Island Police Chief Al Schettino said as the storm hit his city on Sunday afternoon.

Hurricane Irma first made landfall in the Florida Keys on Sunday morning, then made landfall in the state again Sunday afternoon when it hit Marco Island.

The storm's impact was widespread. Even areas that didn't face a direct hit from Irma saw flooding and downed power lines. In Riviera Beach, on Florida's east coast, winds partially ripped roofs off two apartment buildings, forcing rescuers to evacuate about 50 people from the complex, the city's mayor said.

Expected to be even more dangerous than the powerful winds are the storm surges that threaten Florida's coastal cities.

"The threat of catastrophic storm surge flooding is highest along the southwest coast of Florida, where 10 to 15 feet of inundation above ground level is expected," the hurricane center said. "This is a life-threatening situation."

Mass evacuations jammed highways heading north and created a severe gas shortage in parts of Florida days before Irma hit. But as the storm neared, some Floridians hunkered down rather than hitting the road.

"We didn't know if we'd have an opportunity to even get gas," Naples resident Gina Fischer said

So instead, Fischer boarded up the windows of her north Naples home, scrawling a message for the impending storm: "Irma, go away!" Then she headed inland to a friend's house.

"We're going to go to an interior hallway to be safe. We'll wait until the noise is gone and until it's quiet enough for us to come out and it be OK," she told CNN on Sunday.

The latest developments:

-- Strong winds blowing from the northeast have pushed water out of shallow parts of bays and harbors in cities like Tampa and Port Charlotte, where the storm is expected to hit later Sunday night. "As soon as the wind shifts direction, the water will come back quickly and continue to move inland," CNN meteorologist Judson Jones said

JUST WATCHED An ocean used to be here. Irma pushed the water out. Replay More Videos ... MUST WATCH An ocean used to be here. Irma pushed the water out. 01:14

-- Police in North Miami Beach, Florida, said they'd used an armored personnel carrier to rescue a mother and her 4-month-old child from their flooded home.

-- Two tornadoes touched down in Brevard County, Florida, destroying mobile homes in their path, officials said. No injuries have been reported.

-- More than 3 million electric customers are without power across Florida, according to utility companies.

-- A storm surge warning wraps around the state, from Brevard County to Tampa Bay.

Miami faces Irma's wrath

Gusts topping 90 mph whipped Miami on Sunday, knocking out power to more than 750,000 customers in the Miami-Dade area.

Flying objects such as coconuts turned into dangerous projectiles. And at least two construction cranes partially collapsed. One swung vigorously over downtown Miami. Another dangled over the city's Edgewater neighborhood.

Matthew Spuler captured video of waves crashing over a seawall toward his downtown high-rise building.

"There is no seawall whatsoever," Spuler said. "It's amazing. It's under water."

A sky-rise view of downtown Miami shows water overtaking the sea wall as the city braces for the impacts of Hurricane #Irma (📹 via @matthew.spuler) A post shared by CNN (@cnn) on Sep 10, 2017 at 9:26am PDT

Antonio Wilson stayed in his 16th-floor condo in Miami, watching the waters rise below.

"Everything is flooded," he said. "I'm literally stuck."

'You can't survive these storm surges'

Florida Gov. Rick Scott said Irma's wrath is unprecedented, warning that storm surges could be deadly.

"You can't survive these storm surges," he said.

A car sits abandoned in storm surge as Hurricane Irma hits in Fort Lauderdale, Florida.

In Florida and southern Georgia, more than 8 million people face hurricane-force winds topping 74 mph, said Ryan Maue of WeatherBell Analytics.

Those who did not evacuate ahead of the storm are in danger, Federal Emergency Management Agency Administrator Brock Long said Saturday.

"You're on your own until we can actually get in there and it's safe," he told CNN.

Other states may be affected

As Irma moves inland, more than 45 million people will face tropical storm conditions -- meaning winds will top 39 mph, Maue said. Affected states include Florida, Georgia, Alabama, Tennessee, South Carolina and North Carolina.

South Carolina Gov. Henry McMaster issued a mandatory evacuation for some barrier islands.

The National Weather Service in Atlanta issued a tropical storm watch for the area Monday and Tuesday. Schools in the state planned to close Monday.

Irma hit Cuba's Ciego de Avila province late Friday as a Category 5 hurricane before it weakened and headed to the United States.

This is the first year on record that the continental United States has had two Category 4 hurricane landfalls in the same year.

Last month, Hurricane Harvey devastated much of coastal Texas and killed more than 70 people

Are you affected by Irma? Text, iMessage or WhatsApp your videos, photos and stories to CNN (but only if it's safe to do so): +1 347-322-0415.