The British Virgin Islands was under curfew Tuesday as the Caribbean archipelago, still reeling from the devastation caused by Hurricane Irma earlier this month, braced for another megastorm.
"While Hurricane Maria may not be as strong as Hurricane Irma, our present reality is also very different," Orlando Smith, the premier of the self-governing British territory, warned in a statement.
"Effects such as potential flooding and high winds that can turn debris into dangerous projectiles can have a greater and more treacherous impact for us.
"Many residents are still displaced, homes are not fully secured and our natural protections have had severe damage due to the passage of Hurricane Irma.
"Our islands are extremely vulnerable right now."
Maria hit Dominica on Tuesday as a Category Five hurricane, the highest on the five-point Saffir-Simpson scale. It was later downgraded to an "extremely dangerous" Category Four, although the US National Hurricane Center warned it could strengthen again.
"We have lost all what money can buy and replace," Dominica's premier Roosevelt Skerrit posted on Facebook, saying there were initial reports of "widespread devastation".
"My greatest fear for the morning is that we will wake to news of serious physical injury and possible deaths as a result of likely landslides triggered by persistent rains."
Earlier, he said his roof had been blown off and house flooded, leaving him "at the complete mercy of the hurricane".
After being rescued, Skerrit appealed for "help of all kinds" but noted specifically that authorities would need helicopters to survey the damage.
With officials predicting Maria would hit the British Virgin Islands on Tuesday or Wednesday, authorities there imposed a curfew from 6:00pm (2200 GMT) on Monday and urged residents to stay indoors until it passed.
The French territory of Guadeloupe - the bridgehead for aid for Irma-hit French territories - ordered all residents to take shelter in a maximum-level "violet alert".
Heavy rain lashed the island and several areas were without power Tuesday morning.
More than 100 high-risk prisoners escaped on the islands after a prison breach during Hurricane Irma, prompting London to send Royal Marines and police officers to help restore law and order.
The prisoners have since all been recaptured.
More than 1,300 British troops have been deployed to the region since Irma, and London has also sent food, shelter kits and buckets for clean water.
Another 42 military personnel have been stationed on the British Virgin Islands ahead of the arrival of Hurricane Maria.
The Foreign Office has warned against any travel to the archipelago.
A military reconnaissance team is also on standby to go to neighbouring Montserrat and assess any potential needs if the storm hits there later Tuesday.
In addition to government aid, the British Virgin Islands has received help from a group of sailors from Puerto Rico, who have long been visiting the territory on holiday and wanted to help.
The sailors are among a group of thousands who regularly visit the BVI, dubbed the Puerto Rican Navy.
They have dropped off eight containers of food, water and building supplies, according to a BVI government statement.
"Many people, children, humble people, business people, all came with what they could bring to make sure that people in the BVI were taken care of," organiser Alicia Carazo said in the statement.
Irma, also a Category 5 hurricane, left around 40 people dead in the Caribbean before churning west and pounding Florida, where the death toll stood at 50 Monday.
