Tropical Storm Ernesto pummels northeast Caribbean leaving hundreds of thousands in the dark

SAN JUAN, Puerto Rico (AP) — Tropical Storm Ernesto dropped torrential rain on Puerto Rico on Wednesday and left hundreds of thousands of people without power in the US territory as it threatened to strengthen into a major hurricane en route to Bermuda.

The storm was located about 125 miles (200 kilometres) northwest of San Juan, Puerto Rico and was moving over open waters. It had maximum sustained winds of 70 mph (110 kph) and was moving northwest at 16 mph (26 kph).

"While it is possible Ernesto is already a hurricane, radar data does not yet support an upgrade," the National Hurricane Center in Miami said.

Ernesto is expected to become a hurricane later Wednesday.

A tropical storm warning was in effect for Puerto Rico, Vieques, Culebra and the US and British Virgin Islands.

Schools and government agencies remained closed on those islands, where heavy flooding was reported in several areas, forcing officials to block roads.

"A lot of rain, a lot of rain," Culebra Mayor Edilberto Junito Romero said in a phone interview. "We have trees that have fallen on public roads. There are some roofs that are blown off."

Ernesto is forecast to move through open waters for the rest of the week and make its closest approach to Bermuda on Saturday. It is expected to become a major Category 3 storm in the upcoming days, with forecasters warning of heavy swells along the US East Coast as Ernesto moves north-northwest in the Atlantic.

"That means that anybody who goes to the beach, even if the weather is beautiful and nice, it could be dangerous … with those rip currents," said Robbie Berg, warning coordination meteorologist with the National Hurricane Center.

Between 4 to 6 inches of rain is expected in the US and British Virgin Islands and between 6 to 8 inches in Puerto Rico, with up to 10 inches in isolated areas.

The government of the US Virgin Islands reported an island-wide blackout in St Croix, while in Puerto Rico, more than 300,000 customers were without power.

Late on Tuesday, the US Federal Emergency Management Agency had warned people in both US territories to prepare for "extended power outages."

Luma Energy, the company that operates transmission and distribution of power in Puerto Rico, said early Wednesday that its priority was to restore power to hospitals, the island's water and sewer company and other essential services.

Puerto Rico's power grid was razed by Hurricane Maria in September 2017 as a Category 4 storm, and it remains frail as crews continue to rebuild the system.

Not everyone can afford generators on the island of 3.2 million people with a more than 40 per cent poverty rate.

"People already prepared themselves with candles," said Lucía Rodríguez, a 31-year-old street vendor.

Puerto Rico Governor Pedro Pierluisi announced late Tuesday that US President Joe Biden had approved his request to use emergency FEMA funds as a result of the tropical storm.

Ernesto is the fifth named storm of this year's Atlantic hurricane season.

The National Oceanic and Atmospheric Administration has predicted an above-average Atlantic hurricane season this year because of record warm ocean temperatures. It forecast 17 to 25 named storms, with four to seven major hurricanes of Category 3 or higher.

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