Hurricane Ian plunges Cuba into darkness

The sprawling category three hurricane was barrelling north towards the Dry Tortugas, off the Florida Keys, late on Tuesday, with maximum sustained winds of 195km/h, the US National Hurricane Center (NHC) said.

Cuba's electrical grid - decades-old and in desperate need of modernisation, has been faltering for months with blackouts an everyday event across much of the island.

But officials said the storm had proven to be too much for the system, provoking a failure that shut off the lights for the island's 11.3 million people.

"The system was already operating under complex conditions with the passage of Hurricane Ian," said Lazaro Guerra, technical director of Cuba's Electricity Union.

"There is no electricity service in any part of the country right now."

He said the union would work through the night and into Wednesday to restore power as soon as possible.

The hurricane hit Cuba at a time of dire economic crisis. Blackouts and long-running shortages of food, medicine and fuel are likely to complicate efforts to recover from Ian.

Ian made landfall in Cuba's Pinar del Rio Province early on Tuesday, prompting officials early on to cut power to the entire province of 850,000 people as a precautionary measure and evacuate 40,000 people from low-lying coastal areas, according to local media reports.

The storm left at least two dead in western Cuba, state-run media reported.

Violent wind gusts shattered windows and ripped metal roofs off homes and buildings throughout the region, where many houses are decades old and infrastructure is antiquated.

Roads into the areas directly hit by the hurricane remained impassable, blocked by downed trees and powerlines.

Havana appeared to have escaped the brunt of the storm although rain and strong winds uprooted trees, flooded low-lying areas and left many of the city's roadways impassable.

By 8pm local time, it appeared that virtually all of the city was without power, with only some of the larger tourist hotels still lit by generators.

Further north, in Florida, residents and officials were hunkering down in anticipation of what the NHC called a "large and destructive hurricane".

Ian is expected to bring winds of up to 209km/h and as much as 60 centimetres of rain to the Tampa area on Florida's Gulf Coast starting early on Wednesday through Thursday evening, the National Weather Service said.

A hurricane warning has been extended to portions of far southwestern Florida as the storm's path veered slightly from previous predictions.

The storm surge along Florida's Gulf Coast could cause devastating to catastrophic damage with some locations potentially uninhabitable for weeks or months, the service warned, urging residents to move to safe shelter before the storm's arrival.

Australian Associated Press