Florida is preparing for its largest evacuation in seven years as the US state braces for the arrival of Hurricane Milton.
The weather system, which strengthened from a tropical storm to a hurricane on Sunday, is forecast to make landfall in the US on Wednesday.
The hurricane, which is currently sweeping east across the Gulf of Mexico, is predicted to hit the Tampa Bay area before travelling over Orlando.
It comes after more than 200 people were killed when Hurricane Helene tore across southeastern US, including parts of Florida, late last month.
Forecasters say some affected areas will likely be hit again, worsening the damage caused less than a fortnight ago.
Kevin Guthrie, director of Florida’s emergency management division, warned that residents should prepare for the “largest evacuation that we have seen most likely since 2017 Hurricane Irma“.
He added: “I highly encourage you to evacuate.”
In 2017, around seven million people were ordered to flee their homes in Florida ahead of Hurricane Irma, which ended up killing more than 130 people in the state.
The mass evacuation caused long traffic jams on motorways and major queues at petrol stations.
Officials say they have learnt lessons from the chaotic scenes in 2017, and will have emergency fuel stations and charging points for electric vehicles along evacuation routes.
Florida Governor Ron DeSantis warned power cuts were likely and that debris caused by Hurricane Helene would “increase dramatically”.
He added: “I don’t think there’s any scenario where we don’t have major impacts at this point.
“You have time to prepare – all day today, all day Monday, probably all day Tuesday to be sure your hurricane preparedness plan is in place.
“If you’re on that west coast of Florida, barrier islands, just assume you’ll be asked to leave.”
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Pinellas County, which includes the city of St Petersburg, is likely to issue mandatory evacuations for more than 500,000 people in the lowest-lying areas on Monday, officials told a news conference.
Evacuations have already been ordered for six hospitals, 25 nursing homes and 44 assisted living facilities in the county.
St Petersburg Mayor Ken Welch said: “We already will be rebuilding for years because of Hurricane Helene, and that will be exacerbated by the impacts of this storm.
“Remember, Hurricane Helene was 100 miles away from us, moving in a different direction. This is a powerful category two or three hurricane headed directly for us.”
A hurricane alert has also been issued for the northern coast of Mexico‘s Yucatan Peninsula.
Meanwhile, on Sunday, US President Joe Biden announced a further 500 active-duty soldiers would be sent to North Carolina to help with Hurricane Helene recovery efforts, bringing the total to 1,500 troops.
More than $137m (£104m) in federal aid for the region has also been approved so far.