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Hurricane Melissa is predicted to become a uncommon highest-level storm as it veers towards the Caribbean island, causing dangerous rapid inundation and rock falls.

The hurricane, which recorded wind speeds of up to 120 mph as of 0600 Greenwich Mean Time, is now shifting north-west in the Caribbean and is anticipated to make landfall by early next week, according to hurricane specialists.

Advisories of blackouts and damage to infrastructure have been announced as the hurricane generates up to thirty inches of rain and sea level surges as high as 4m above typical tides. "Seek shelter now," residents have been advised.

This hurricane is the 13th storm in the ongoing Atlantic hurricane season, which normally finishes in November.

Most Intense Hurricane Risk

A Category 5 hurricane is the most powerful category, with wind speeds of at least 157 miles per hour.

While the hurricane is expected to diminish in strength to a category four cyclone before arriving at the island, meteorologists said there was "almost no noticeable change in the total effects" upon reaching the coast, and that the cyclone will be "at least that intensity" when it strikes the country.

Urgent Safety Steps

With storm-force wind and rainfall already expected well before it passes over central Jamaica - possibly even the city of Kingston - advisories indicate that "readiness efforts must be accelerated".

"Several days of damaging winds and torrential rain are underway and will cause severe and deadly flash flooding and many landslides," advised meteorological officials.

The country's head of government Andrew Holness stated: "I know that there are many Jamaicans who are concerned, who are extremely apprehensive, and with good reason: you should be concerned.

"But the most effective method to handle anxiety and any unease and concern is to stay ready."

Locals are being advised to fortify their houses with protective bags and plywood sheets, and to stock up on essentials.

Wider Impact

Warnings are also in effect for regions of the neighboring country such as the main city, Port au Prince, the adjacent nation and the eastern part of Cuba, where this storm is expected to bring similar effects by the midweek period.

Landslides presently generated by the cyclone have already killed two in the country, according to local authorities.

Future Trajectory

The hurricane is forecast to cross Cuba by Wednesday before passing across the Greater Antilles and out into the Atlantic Ocean.

By the point it makes contact with the Caribbean nation, it is forecast to have diminished to a third-level storm.

Climate Context

Even though it is hard to connect individual weather events to environmental shifts, scientists say it is causing climate patterns more common and more severe.

Warmer oceans create more moisture in the air, helping fuel the formation of tropical cyclones.

Prior to the start of this season's Caribbean cyclone season, weather organizations predicted higher-than-average occurrence, referencing heated marine conditions and potential enhanced seasonal rains around African coastal regions - where tropical systems typically originate.