Updated: 4:17 p.m. | Posted: 2:35 p.m.
A monster Hurricane Irma roared into Florida with 130 mph winds Sunday for what could be a sustained assault on nearly the entire Sunshine State, submerging streets, knocking out power to millions and snapping construction cranes over the Miami skyline.
The 400-mile-wide (640-kilometer-wide) storm blew ashore in the morning in the mostly cleared-out Florida Keys and then began a slow march up the state's west coast. Forecasters said it could hit the heavily populated Tampa-St. Petersburg area by Monday morning.
"Pray, pray for everybody in Florida," Gov. Rick Scott said on "Fox News Sunday" as some 116,000 people statewide waited it out in shelters.
Irma struck as a Category 4 but by late afternoon had weakened to a Category 2 with 110 mph (177 kph) winds that whipped Florida's palm trees with drenching squalls. A storm surge of over 10 feet (3 meters) was recorded in the Keys, and forecasters warned some places on the mainland could get up to 15 feet of water.
There were no immediate confirmed reports of any deaths in Florida, on top of 24 people killed during the storm's destructive trek across the Caribbean.
Many streets were flooded in downtown Miami and other cities. Appliances and furniture were seen floating away in the low-lying Keys, though the full extent of Irma's fury there was not clear.
A Miami woman who went into labor was guided through delivery by phone when authorities couldn't reach her in high winds and street flooding. Firefighters later took her to the hospital.
An apparent tornado spun off by Irma destroyed six mobile homes in Palm Bay, hundreds of miles away along the state's Atlantic coast. Flooding was reported along Interstate 4, which cuts across Florida's midsection.
In downtown Miami, two of the two dozen construction cranes looming over the skyline collapsed in the wind. No injuries were reported. City officials said it would have taken about two weeks to move the massive equipment.
Curfews were imposed in Miami, Tampa, Fort Lauderdale and much of the rest of South Florida, and some arrests of violators were reported. Miami Beach barred outsiders from the island.
Fort Lauderdale police arrested nine people they said were caught on TV cameras looting sneakers and other items from a sporting goods store and a pawn shop during the hurricane.
More than 2 million homes and businesses across the state lost power, and utility officials said it will take weeks to restore electricity to everyone.
While the projected track showed Irma raking the state's Gulf Coast, forecasters warned that the entire state -- including the Miami metropolitan area of 6 million people -- was in danger because of the sheer size of the storm.
Nearly 7 million people in the Southeast were warned to evacuate, including 6.4 million in Florida alone.
About 30,000 people heeded orders to leave the Keys as the storm closed in, but an untold number refused, in part because to many storm-hardened residents, staying behind in the face of danger is a point of pride.
John Huston, who stayed in his Key Largo home, watched his yard flood even before the arrival of high tide. "Small boats floating down the street next to furniture and refrigerators. Very noisy," he said by text message. "Shingles are coming off."
Irma made landfall just after 9 a.m. at Cudjoe Key, about 20 miles outside Key West, forecasters said. During the afternoon, it rounded Florida's southwestern corner and pushed toward Naples, Sanibel, Fort Myers and, beyond that, Sarasota, at 14 mph (23 kph).
Its hurricane-force winds extended 80 miles (129 kilometers) from its center.
Meteorologist Ryan Maue of WeatherBell Analytics said the entire Florida peninsula will be raked by Irma's right front quadrant -- the part of a hurricane that usually brings the strongest winds, storm surge, rain and tornadoes.
The Tampa-St. Petersburg area, with a population of about 3 million, has not taken a direct hit from a major hurricane since 1921.
The wind began picking up in St. Petersburg, some 400 miles north the Keys, and people started bracing for the onslaught.
"I've been here with other storms, other hurricanes. But this one scares me," Sally Carlson said as she snapped photos of the waves crashing against boats. "Let's just say a prayer we hope we make it through."
Forecasters said a weakened Irma could push into Georgia, Alabama, Mississippi, Tennessee and beyond. A tropical storm warning was issued for the first time ever in Atlanta, some 200 miles from the sea.
"Once this system passes through, it's going to be a race to save lives and sustain lives," Federal Emergency Management Agency chief Brock Long said on "Fox News Sunday."
With FEMA still dealing with the aftermath of Hurricane Harvey in Houston, Irma could test the agency's ability to handle two disasters at the same time.
Florida's governor activated all 7,000 members of the Florida National Guard, and 10,000 guardsmen from elsewhere were being deployed.
For days, forecasters had warned that Irma was taking dead aim at the Miami metropolitan area and the rest of Florida's Atlantic coast.
But then Irma made a more pronounced westward shift -- the result of what meteorologists said was an atmospheric tug-of-war between weather systems that nudged Irma and determined when it made its crucial right turn into Florida.
Irma at one time was the most powerful hurricane ever recorded in the open Atlantic, a Category 5 with a peak wind speed of 185 mph (300 kph). Given its size, strength and projected course, it could still prove one of the most devastating hurricanes ever to hit Florida.
The storm brought memories of Hurricane Charley, which blew ashore near Fort Myers in 2004 with winds near 149 mph (240 kph). It caused $15 billion in damage and was blamed for as many as 35 deaths in the U.S.