Cyclone Melissa is forecast to become a uncommon highest-level cyclone as it shifts in the direction of the Caribbean island, bringing life-threatening flash flooding and rock falls.
The hurricane, which had winds of up to 195 km/h as of 06:00 GMT, is now shifting northwest in the Caribbean and is projected to hit the coast by early next week, based on data from hurricane specialists.
Warnings of electricity outages and damage to infrastructure have been released as Melissa brings up to thirty inches of rainfall and sea level surges as high as 4m above normal levels. "Take cover without delay," inhabitants have been advised.
The cyclone is the 13th named storm in the current Atlantic hurricane season, which normally finishes in late autumn.
A highest-level storm is the most powerful category, with sustained winds of at least 157mph.
While the hurricane is projected to reduce in intensity to a fourth-level storm before reaching the island, meteorologists said there was "almost no noticeable change in the overall impacts" upon making contact with land, and that the cyclone will be "equally strong" when it hits the island.
With tropical storm-strength winds and rain predicted to begin well before it crosses Jamaica's central region - possibly even the capital, Kingston - alerts indicate that "safety measures need to be finalized quickly".
"A multi-day period of harmful winds and heavy rainfall have begun and will cause severe and deadly rapid water accumulation and multiple mudslides," urged meteorological officials.
Jamaican Prime Minister the statesman stated: "I understand that there are many Jamaicans who are worried, who are very concerned, and appropriately: worry is natural.
"Yet the optimal approach to handle anxiety and any nervousness and worry is to remain prepared."
Residents are being told to fortify their houses with sand barriers and timber panels, and to accumulate necessary supplies.
Warnings are also ongoing for regions of Haiti such as the primary urban center, the Dominican Republic and eastern Cuba, where the hurricane is anticipated to bring similar effects by the middle of next week.
Rock slides presently generated by the hurricane have resulted in two fatalities in the country, according to local authorities.
This weather system is predicted to pass over the island nation by the middle of the week before traveling via the Greater Antilles and entering the Atlantic Ocean.
By the point it arrives at Cuba, it is anticipated to have reduced to a category three storm.
While it is hard to link individual weather events to environmental shifts, scientists say it is resulting in meteorological events more prevalent and more severe.
Higher ocean heat generate more moisture in the environment, aiding in the creation of tropical cyclones.
Prior to the commencement of this season's Caribbean cyclone season, meteorological authorities forecast higher-than-average occurrence, mentioning heated marine conditions and potential more intense weather patterns around West Africa - where Atlantic storms often form.
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