Florida is bracing for winds of up to 160mph as people continue to evacuate ahead of the arrival of Hurricane Milton.
The storm has the “potential to be one of the most destructive hurricanes” the area has seen when it makes landfall late Wednesday or early on Thursday, according to the US National Hurricane Center.
Some residents have insisted they will stay after millions were ordered to evacuate, while officials warned anyone staying behind will face grim odds of surviving.
Milton has been a category 5 hurricane during much of its approach and despite the recent downgrading to a category 4, it remains “major and strong”, Florida governor Ron DeSantis said.
It is expected to bring widespread destruction to the Tampa Bay area, which is home to more than 3.3 million people.
President Joe Biden postponed an upcoming trip to Germany and Angola in order to oversee preparations for the storm – in addition to the ongoing response to Hurricane Helene.
“This could be the worst storm to hit Florida in over a century, and God-willing it won’t be, but it’s looking like that right now,” Mr Biden said.
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Heavy rain is already spreading across many communities with conditions expected to rapidly deteriorate throughout Wednesday and into Thursday.
Experts warned of the risk of catastrophic and life-threatening flash flooding, while several tornadoes were also likely across parts of central and southern Florida.
Such is the power of Hurricane Milton, it could land a once-in-a-century hit on the cities of Tampa and St Petersburg, engulfing the regions with possibly deadly storm surges.
Forecasters warned the storm could bring eight to 12ft (2.44-3.66m) storm surges, leading to further possible evacuation orders being issued along the Gulf Coast.
Eleven states in Florida have issued mandatory evacuation orders with up to nearly six million people said to be in the potential path of the storm.
‘We haven’t seen a storm like this’
Pasco County is located on Florida’s west coast and its director of emergency management Andrew Fossa echoed the warnings from other officials.
“I hate to say it like this – Pasco County’s going to get a black eye from this one,” he said.
“We haven’t seen a storm like this in a lifetime.”
Tampa mayor Jane Castor said up to 15ft (4.6m) of storm surge being forecast for her city would be deep enough to swallow an entire house.
“So if you’re in it, basically that’s the coffin that you’re in,” she warned.
A lengthy line of vehicles has been heading north as residents moved to safer areas, while hundreds of flights have been cancelled with many more expected to be grounded.
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In Riverview, south of Tampa, several drivers waiting in a long line for fuel said they had no plans to evacuate.
“I think we’ll just hang, you know – tough it out,” said Martin Oakes, of nearby Apollo Beach.
“We got shutters up. The house is all ready. So this is sort of the last piece of the puzzle.”
Forecasters said Milton could inflict wind and storm surge damage in coastal areas in the state of Georgia.
Tropical storm warnings have been issued for as far north as Savannah, which is roughly 200 miles from the projected path of the hurricane’s centre.
The storm is expected to retain hurricane strength as it crosses central Florida on Thursday on a path east toward the Atlantic Ocean.