Hurricane the storm is predicted to escalate to a infrequent highest-level hurricane as it veers toward the Caribbean island, causing dangerous flash flooding and rock falls.
The hurricane, which recorded winds of up to 195 km/h as of 6:00 AM GMT, is now shifting northwest in the Caribbean Sea and is anticipated to hit the coast by midweek, as reported by weather experts.
Warnings of power cuts and damage to infrastructure have been issued as Melissa produces up to 76cm of precipitation and sea level surges as high as 13ft above typical tides. "Seek shelter now," inhabitants have been advised.
This hurricane is the thirteenth cyclone in the current Atlantic hurricane season, which usually concludes in the eleventh month.
A category five storm is the strongest type, with wind speeds of at least 252 km/h.
While Melissa is set to diminish in strength to a fourth-level cyclone before reaching the island, experts said there was "very little practical difference in the overall impacts" upon making contact with land, and that the storm will be "at least that intensity" when it strikes the nation.
With tropical storm-strength gusts and precipitation predicted to begin ahead of it moves across central Jamaica - possibly even the city of Kingston - warnings state that "safety measures need to be finalized quickly".
"A multi-day period of destructive gusts and intense precipitation have begun and will cause catastrophic and life-threatening sudden floods and numerous mudslides," advised meteorological officials.
The country's head of government Andrew Holness commented: "I understand that there are many Jamaicans who are worried, who are very concerned, and appropriately: you should be concerned.
"However the most effective method to manage nervousness and any nervousness and concern is to be prepared."
Inhabitants are being advised to protect their properties with protective bags and timber panels, and to stock up on essentials.
Alerts are also active for parts of Haiti including the primary urban center, the adjacent nation and Cuba's eastern region, where this storm is anticipated to bring analogous consequences by the midweek period.
Mudslides presently generated by the storm have resulted in two fatalities in the country, according to local authorities.
This weather system is predicted to pass over Cuba by Wednesday before passing across the Antillas Mayores and emerging into the open ocean.
By the point it arrives at the Caribbean nation, it is anticipated to have diminished to a third-level storm.
Even though it is hard to link individual weather events to environmental shifts, scientists say it is making climate patterns more common and more intense.
Higher ocean heat create more moisture in the atmosphere, helping fuel the formation of tropical cyclones.
Ahead of the start of the current Atlantic storm period, climate agencies predicted increased storm frequency, mentioning warmer seas and potential stronger monsoon activity around West Africa - where hurricanes typically originate.
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