Hurricane Beryl: 'Extremely dangerous' storm heading for Caribbean's Windward Islands

"Extremely dangerous" Category 4 storm Hurricane Beryl is heading towards the Caribbean's Windward Islands, where it is expected to bring life-threatening winds and flash flooding on Monday.

The first hurricane of the 2024 season was located about 150 miles (240km) southeast of Barbados on Sunday night, with maximum sustained winds of 130 mph (215kph), the US National Hurricane Center (NHC) said.

"Beryl is expected to remain an extremely dangerous major hurricane as its core moves through the Windward Islands into the eastern Caribbean," the NHC said in its latest advisory.

The centre of the hurricane is expected to travel across the Windward Islands on Monday morning as a Category 4 storm, the second-strongest level on a five-step scale, bringing "potentially catastrophic wind damage" to St. Vincent and the Grenadines, and Grenada.

It is rare for a major hurricane to appear this early in the Atlantic hurricane season, which runs from June 1 to November 30.

Fishing boats lie in a field after being moved ahead of Hurricane Beryl in Calliaqua, St. Vincent (AP)

On Sunday, Beryl became the earliest Category 4 hurricane on record, beating Hurricane Dennis, which became a Category 4 on July 8, 2005, according to NHC data.

Hurricane warnings have been issued in Barbados, St. Lucia, St. Vincent and the Grenadine Islands, Grenada and Tobago. A tropical storm watch has been issued for Dominica, Trinidad, and parts of the Dominican Republic and Haiti.

Authorities and residents on the Caribbean islands were preparing for the storm's arrival.

Tobago has opened shelters, closed schools for Monday, and cancelled elective surgeries in the hospitals, authorities said.

People buy supplies in Mexico as they prepare ahead of Hurricane Beryl (REUTERS)

The hurricane is expected to bring 3 to 6 inches (8 to 15 cm) of rain across Barbados and the Windward Islands throughout the day on Monday, which the NHC warned could cause flash flooding in vulnerable areas.

Large, dangerous swells are also expected to batter the southern coasts of Puerto Rico and Hispaniola.

In May, the US National Oceanic and Atmospheric Administration predicted above-normal hurricane activity in the Atlantic in 2024, in part due to near-record warm ocean temperatures.