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Hurricane Melissa is predicted to become a infrequent highest-level cyclone as it shifts in the direction of Jamaica, causing dangerous sudden floods and rock falls.

The cyclone, which registered wind speeds of up to 120 mph as of 06:00 GMT, is currently turning north-west in the Caribbean and is expected to reach land by midweek, based on data from hurricane specialists.

Warnings of electricity outages and disruption to utilities have been issued as the hurricane brings up to 30 inches of precipitation and storm surges as high as 4m above ground. "Take cover without delay," residents have been advised.

This hurricane is the 13th named hurricane in the current Atlantic season, which normally finishes in the eleventh month.

Most Intense Hurricane Danger

A highest-level hurricane is the strongest type, with wind speeds of at least 157 miles per hour.

While Melissa is expected to diminish in strength to a Category 4 hurricane before reaching the island, experts said there was "very little practical difference in the general consequences" upon making contact with land, and that the cyclone will be "at least that intensity" when it impacts the country.

Critical Safety Steps

With tropical storm-strength winds and rain anticipated well in advance ahead of it moves across central Jamaica - perhaps encompassing the city of Kingston - advisories emphasize that "preparations should be rushed to completion".

"An extended timeframe of harmful winds and heavy rainfall are underway and will cause devastating and dangerous rapid water accumulation and numerous mudslides," urged meteorological officials.

The country's head of government the statesman commented: "I understand that there are numerous residents who are anxious, who are very concerned, and rightfully so: worry is natural.

"However the optimal approach to address nervousness and any apprehension and concern is to stay ready."

Residents are being advised to secure their homes with sandbags and wooden boards, and to accumulate basic necessities.

Wider Impact

Warnings are also in effect for regions of Haiti including the main city, Port au Prince, the adjacent nation and the eastern part of Cuba, where Melissa is projected to bring comparable impacts by the middle of next week.

Rock slides already being caused by the hurricane have caused two deaths in the country, according to emergency services.

Expected Trajectory

Melissa is forecast to cross Cuba by the middle of the week before moving through the Caribbean archipelago and emerging into the Atlantic.

By the moment it makes contact with the Caribbean nation, it is predicted to have reduced to a third-level storm.

Climate Background

Even though it is hard to connect specific storms to environmental shifts, scientists say it is resulting in weather phenomena more common and more severe.

Warmer oceans generate more moisture in the environment, contributing to the development of tropical cyclones.

Ahead of the start of this year's Atlantic storm period, meteorological authorities projected increased storm frequency, mentioning warmer seas and potential enhanced seasonal rains around the western African continent - where Atlantic storms typically originate.