Florida braces for Category 5 storm Milton after Helene's rampage

Hurricane Milton has exploded in strength to become a potentially catastrophic Category 5 storm bound for Florida, threatening the US state with a second ferocious hurricane in as many weeks.

Milton, forecast to batter Mexico's Yucatan peninsula as it churns eastward, rapidly intensified to the highest category on a scale of five on Monday, triggering evacuation orders and warnings of savage conditions on Florida's west coast.

The National Hurricane Center (NHC) said the storm's maximum sustained winds were near 285 kilometres per hour and that air pressure at the centre of the storm was at a "near record low."

Communities hit by Hurricane Helene, which slammed Florida late last month, raced to remove debris that could become dangerous projectiles as Milton barrels in.

"Last time, people's cars were underwater... but the bigger issue this time is going to be the wind," said David Levitsky, a retired homeowner on Treasure Island, in Pinellas County.

Residents on the low-lying island have been piling up debris from Helene's flooding in their front yards for removal.

"All this stuff is just wind fodder that's going to just be blowing down the street and hitting who knows what," the 69-year-old told the AFP news agency.

Amid the wreckage, Florida Governor Ron DeSantis, a conservative known to clash with the federal government, found himself under fire after broadcaster NBC reported he was ignoring phone calls from Harris on the Helene recovery.

DeSantis did speak to President Joe Biden about the preparations, the White House said late on Monday.

Vice President Kamala Harris slammed the Republican governor for "playing political games."

"It is about political gamesmanship, instead of doing the job you took an oath to do, which is to put the people first," she told reporters while also criticising rival Donald Trump as "extraordinarily irresponsible."

Worst hit in 100 years

As Milton barreled toward Florida, state authorities have issued mandatory evacuation orders for areas including some parts of Tampa, a metropolitan area of more than three million people that could take a direct hit.

"If the storm stays on the current track, it will be the worst storm to impact the Tampa area in over 100 years," the National Weather Service said.

A major storm surge for Florida's west coast is forecast for Tuesday night or early Wednesday, and Tampa could suffer an influx of water between 2.4 to 3.6 metres above ground level.

Rainfall of 25 centimetres, with localised spots of up to 38 centimetres, is expected to cause severe flash flooding.

In Mexico's Yucatan, workers boarded up glass doors and windows, fishermen hauled boats ashore, and schools were suspended.

In the southeastern United States, emergency workers are still struggling to provide relief in the aftermath of Helene, which killed at least 230 people across several states.

Helene hit the Florida coastline on September 26 as a Category 4 hurricane, dumping rain and causing massive flooding in remote inland towns in states further north, including North Carolina and Tennessee.

Deanne Criswell, head of the Federal Emergency Management Agency (FEMA), also dismissed the claims about money being diverted to migrants as false and slammed the misinformation as "dangerous."

She warned Monday that "these storms are bringing more water than they ever have, and so while we have the wind risk, the water is what's killing people."

Helene was the deadliest natural disaster to hit the US mainland since 2005's Hurricane Katrina, with the death toll still rising.