KANSAS CITY, Mo. -- To give some perspective on just how wide Hurricane Irma spans, Fox 4 Meteorologist Joe Lauria placed the image of Irma over the Kansas City region.
Irma, which stretches nearly 500 miles, would completely cover the state of Missouri.
Joe says if the eye of the storm was placed on top of Kansas City, it would stretch east into central Illinois and west into central Kansas.
Hurricane Irma -- one of the strongest storms ever recorded in the Atlantic -- is hurtling toward northern Puerto Rico and the Virgin Islands on Wednesday afternoon after smashing a string of small northern Caribbean islands, which early reports suggest suffered heavy damage.
Irma's core, with maximum sustained winds of 185 mph -- well above the 157 mph threshold of a Category 5 -- slammed Barbuda early Wednesday before hitting St. Martin and Anguilla.
The storm's powerful center could hit parts of the Virgin Islands and then pass just north of Puerto Rico -- a US territory of about 3.4 million people -- on Wednesday afternoon and night, threatening heavy rain and dangerous coastal storm surges, forecasters said.
Gov. Ricardo Rosselló urged Puerto Ricans in flood-prone areas to head to designated shelters.
"Please allow us to help you seek refuge in shelter, and let people know the priority is to weather the storm (and) seek safe haven," Rossello said.
On Tortola, the largest of the British Virgin Islands, Kennedy Banda said fierce winds blew out the windows of his home Wednesday afternoon. He and his family were taking shelter in a bathroom; he said he was bracing his body against the door in an attempt to keep it shut.
"Everything is blown out," he told CNN by phone near Road Town. "Everything is gone."
Earlier, he posted video on Facebook showing wind and pounding rain whipping the shoreline as Irma's core approached.
The hurricane earlier Wednesday battered a string of northern Caribbean island nations, situated east of the more populous Virgin Islands group and Puerto Rico.
Early reports suggested damage on parts of the smaller islands -- a tropical region popular with tourists.
Barbuda, home to about 1,600 people, was "so badly damaged that there is no communication" from the island, said Keithley Meade, director of a meteorological office in Antigua and Barbuda.
"We have a lot of broken trees across the island," Meade said from Antigua, whose 80,000 people comprise most of the two-island nation's population.
Irma destroyed four of the most solid government buildings on the French-administered portion of nearby St. Martin, an island of about 75,000 people, French Interior Minister Gérard Collomb said Wednesday in Paris.
It's likely that all other older buildings there have at least been damaged, he said.
Roughly 10 of these smaller islands -- such as St. Martin, Antigua and Barbuda, and St. Kitts and Nevis -- were pounded by hurricane conditions. One, Guadeloupe, has about 405,000 residents. The rest have about 264,400 people combined.
-- Around noon ET Wednesday, Irma's core was spinning about 55 miles east of St. Thomas of the US Virgin Islands, with maximum sustained winds of 185 mph.
-- In the US Virgin Islands, Gov. Kenneth E. Mapp ordered a 36-hour curfew that started at 6 a.m. local time Wednesday.
-- By Thursday and Friday, Irma is likely to be near the Dominican Republic's and Haiti's northern coasts, the Turks and Caicos islands and the southeastern Bahamas, where storm surges of up to 20 feet are possible, the hurricane center said.
-- It's too early to tell whether it will make landfall on the US mainland. Computer models show it could churn near Florida's east coast by late Sunday, and forecasters warn the core still could hit land there.
-- In Broward County, Florida, a mandatory evacuation will go into effect at noon Thursday for areas east of Federal Highway, Mayor Barbara Sharief said. The evacuation zone includes low-lying areas and mobile homes in the county, which includes Fort Lauderdale, Hollywood, and Pompano and Deerfield beaches.
-- Floridians should heed any evacuation order, Gov. Rick Scott said Wednesday. "(A) storm surge could cover your house. We can rebuild homes -- we cannot rebuild your family," he said.
-- Several high-profile sports games have been postponed in Florida because of the storm, including NFL's Buccaneers-Dolphins match that had been scheduled for Sunday in Miami.
'We've been hiding in the bathroom'
Virginia Barreras told CNN she was riding out the storm on St. Martin in a "sanctuary hotel" where tourists and locals were encouraged to check in before the eye wall hit.
"The palm trees are bent over and (I) can't see anything but white," she said early Wednesday, before Irma's core passed. "The walls shake when the wind blows hard, and we can hear debris being thrown around.
Irma affected many northern Caribbean islands Wednesday, even those not touched by the powerful core. In Marigot, Guadeloupe, Florida resident Loren Ann Mayo rode out the storm on the sixth floor of a beachside hotel.
"We've been hiding in the bathroom," she said in a video she posted to Facebook. About an inch of water covered parts of the floor, and pieces of drywall had fallen onto a balcony and a bed inside, she said.
Mayo was there on a business trip. "It is pouring down rain. It is howling," she told CNN. "Most people are either in their bathroom, or they've been moved downstairs to the third floor where management thinks is a very, very safe spot."
Islands under hurricane warning include Anguilla, Puerto Rico, the US and British Virgin Islands, St. Martin/St. Maarten, St. Barts, parts of northern Haiti and the Dominican Republic, the southeastern Bahamas and the Turks and Caicos Islands.
Puerto Rico: Long lines
Storm surge is a concern for the Virgin Islands (up to 11 feet) and Puerto Rico (up to 5 feet), as is heavy rain (up to 10 inches in the Virgin Islands, and up to 15 in parts of Puerto Rico).
Rosselló, Puerto Rico's governor, declared a state of emergency and has activated the National Guard.
For hours, people lined up outside hardware stores Tuesday, hoping to get plywood, batteries and power generators. If Irma knocks out power, Puerto Ricans said it could take weeks or months before it is restored.
Last month, the director of Puerto Rico's power utility, Ricardo Ramos Rodríguez, said several factors have made the island's electric system "vulnerable and fragile," CNN affiliate WAPA reported.
One of those is the shortage of employees. Many workers recently retired or left their jobs for better prospects on the US mainland, Ramos Rodríguez said.
Turks and Caicos and the Bahamas
Forecasters warn that Irma's likely path will be near the Turks and Caicos Islands on Thursday and the southeastern Bahamas on Friday -- and that the destruction could be devastating.
In the Bahamas, emergency evacuations have been ordered for six southern islands -- Mayaguana, Inagua, Crooked Island, Acklins, Long Cay and Ragged Island.
"This is the largest such evacuation in the history of the country," Prime Minister Hubert Minnis said.
Bahamian officials also canceled vacation time for police and defense forces.
"Some of the (Bahamian) islands aren't more than 9 feet (above sea level). Storm surges there may be 20 feet. You get the idea what's going to happen to those islands," CNN meteorologist Chad Myers said.
Evacuations set for Florida
Jimmy Brumbaugh packed up his family in their RV and left Astatula, Florida, for Georgia. As he headed out of town, he posted a picture showing a long line of cars, waiting to get gas.
"People are genuinely scared down here," he said. "... We are dead center in the state, but I'm not taking any chances. I also don't want to put my family through the misery of riding out the storm. We've done it before, and it's horrible."
In Eustis, northwest of Orlando, Pat Arnold and her husband took precautions in case Irma hit.
"My husband and I prepared for Irma by getting some cash out, fueling cars and filling gas cans with nonethanol gas (for use with our chainsaw if needed), ... and making sure we have enough batteries, canned food, etc," she told CNN.
From Miami Beach to Ocala, Floridians braced for the storm, with some posting images of empty shelves at local grocery stores.
Miami-Dade County will start evacuating special-needs residents Wednesday, and may announce other evacuations soon, Mayor Carlos Gimenez said.
Schools and county offices will be closed Thursday and Friday.
Monroe County, which includes the Florida Keys, was ordering visitors to evacuate by sunrise Wednesday, and residents should begin to evacuate 12 hours later.
After declaring a state of emergency across Florida, the governor said President Donald Trump had "offered the full resources of the federal government."
Scott also ordered 7,000 National Guard troops to report for duty by Friday morning.
"Learn your evacuation zone. Listen to your locals," he said. "This storm has the potential to devastate this state. You have to take this seriously."
Meanwhile, Tropical Storm Jose, in the open Atlantic far to the southeast of Irma, is expected to become a hurricane by Wednesday night.
"Interests in the Leeward Islands should monitor the progress of Jose," the National Hurricane Center said.
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