Cyclone Melissa is predicted to become a infrequent category five cyclone as it shifts in the direction of the Caribbean island, causing dangerous sudden floods and mudslides.
The cyclone, which had wind speeds of up to 120 mph as of 06:00 GMT, is presently veering north-west in the Caribbean region and is anticipated to hit the coast by midweek, based on data from hurricane specialists.
Alerts of blackouts and disruption to utilities have been issued as this storm produces up to 30 inches of precipitation and sea level surges as high as 13ft above normal levels. "Find safe refuge immediately," residents have been told.
Melissa is the 13th hurricane in the current Atlantic storm period, which usually concludes in the eleventh month.
A highest-level storm is the strongest type, with winds of at least 157mph.
Even though the hurricane is set to weaken to a fourth-level storm before arriving at 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 "equally strong" when it impacts the nation.
With storm-force winds and rain already expected well before it moves across the island's interior - possibly even the capital, Kingston - warnings emphasize that "preparations should be rushed to completion".
"A multi-day period of destructive gusts and intense precipitation has started and will cause catastrophic and life-threatening sudden floods and multiple rock slides," advised weather authorities.
Jamaican Prime Minister the official said: "I realize that there are many Jamaicans who are anxious, who are very concerned, and appropriately: concern is justified.
"But the optimal approach to manage nervousness and any nervousness and worry is to stay ready."
Inhabitants are being told to fortify their houses with sandbags and timber panels, and to accumulate essentials.
Warnings are also active 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 analogous consequences by the middle of next week.
Landslides presently generated by the storm have resulted in two fatalities in the country, according to emergency services.
The hurricane is projected to pass over Cuba by Wednesday before traveling via the Antillas Mayores and entering the open ocean.
By the moment it arrives at Cuba, it is forecast to have weakened to a third-level hurricane.
Although it is hard to associate individual weather events to environmental shifts, scientists say it is resulting in meteorological events increasingly frequent and more intense.
Warmer oceans generate additional humidity in the atmosphere, helping fuel the formation of storms.
Prior to the start of this year's Atlantic hurricane season, climate agencies projected higher-than-average occurrence, mentioning warmer seas and potential stronger monsoon activity around African coastal regions - where tropical systems typically originate.
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