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Cyclone the storm is projected to strengthen into a infrequent highest-level cyclone as it turns in the direction of Jamaica, bringing life-threatening rapid inundation and landslides.

The cyclone, which had wind speeds of up to 195 km/h as of 06:00 GMT, is now shifting northwest in the Caribbean Sea and is expected to make landfall by Tuesday, according to meteorological authorities.

Warnings of electricity outages and damage to infrastructure have been issued as this storm produces up to 76cm of rain and sea level surges as high as 4m above ground. "Seek shelter now," inhabitants have been advised.

This hurricane is the 13th hurricane in the current Atlantic storm period, which typically ends in late autumn.

Most Intense Hurricane Threat

A highest-level cyclone is the most powerful category, with wind speeds of at least 157 miles per hour.

While Melissa is set to diminish in strength to a category four cyclone before making landfall on the island, authorities said there was "almost no noticeable change in the general consequences" upon landfall, and that the hurricane will be "at least that intensity" when it hits the nation.

Immediate Safety Steps

With storm-force gusts and precipitation already expected ahead of it passes over the island's interior - possibly even the national capital - alerts state that "readiness efforts must be accelerated".

"A multi-day period of damaging winds and intense precipitation has started and will cause devastating and dangerous sudden floods and numerous rock slides," advised weather authorities.

The country's head of government Andrew Holness commented: "I know that there are many Jamaicans who are anxious, who are very concerned, and appropriately: worry is natural.

"However the optimal approach to address worry and any nervousness and anxiety is to remain prepared."

Locals are being told to secure their homes with sand barriers and timber panels, and to stock up on essentials.

Broader Impact

Advisories are also in effect for regions of the neighboring country such as the capital, Port au Prince, the neighboring country and Cuba's eastern region, where this storm is expected to bring comparable impacts by the midweek period.

Mudslides presently generated by the hurricane have caused two deaths in the country, according to emergency services.

Expected Trajectory

The hurricane is forecast to pass over Cuba by Wednesday before traveling via the Greater Antilles and out into the open ocean.

By the point it reaches the Caribbean nation, it is anticipated to have reduced to a third-level storm.

Weather Connection

Although it is hard to connect specific storms to climate change, scientists say it is resulting in weather phenomena more prevalent and more intense.

Higher ocean heat generate more moisture in the atmosphere, aiding in the development of storms.

Prior to the beginning of this year's Caribbean cyclone season, meteorological authorities forecast above-normal activity, citing heated marine conditions and possible stronger monsoon activity around the western African continent - where Atlantic storms typically originate.