Tropical Storm the storm is predicted to strengthen into a uncommon Category 5 storm as it turns towards the Caribbean island, bringing life-threatening flash flooding and landslides.
The cyclone, which recorded winds of up to 195 km/h as of 06:00 GMT, is currently turning north-west in the Caribbean region and is projected to reach land by Tuesday, as reported by meteorological authorities.
Advisories of blackouts and structural damage have been issued as Melissa generates up to thirty inches of precipitation and storm surges as high as thirteen feet above normal levels. "Take cover without delay," inhabitants have been urged.
Melissa is the 13th named hurricane in this year's Atlantic season, which normally finishes in late autumn.
A Category 5 cyclone is the most powerful category, with winds of at least 252 km/h.
Although Melissa is expected to diminish in strength to a fourth-level 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 impacts the nation.
With tropical storm-strength winds and rain predicted to begin well before it moves across the island's interior - possibly even the city of Kingston - advisories state that "preparations should be rushed to completion".
"An extended timeframe of harmful winds and intense precipitation are underway and will cause catastrophic and life-threatening sudden floods and multiple rock slides," advised climate experts.
The country's head of government Andrew Holness stated: "I realize that there are countless citizens who are anxious, who are extremely apprehensive, and with good reason: you should be concerned.
"But the optimal approach to handle worry and any nervousness and anxiety is to remain prepared."
Locals are being advised to protect their properties with sand barriers and timber panels, and to gather basic necessities.
Alerts are also ongoing for parts of the neighboring country encompassing the main city, Port au Prince, the Dominican Republic and eastern Cuba, where the hurricane is anticipated to bring analogous consequences by the middle portion of the coming week.
Mudslides already being caused by the hurricane have already killed two in the country, according to the nation's Civil Protection agency.
This weather system is projected to cross Cuba by Wednesday before traveling via the Caribbean archipelago and entering the open ocean.
By the moment it arrives at Cuba, it is forecast to have weakened to a category three cyclone.
Even though it is challenging to connect individual weather events to environmental shifts, scientists say it is making meteorological events increasingly frequent and more intense.
Warmer oceans generate more moisture in the air, contributing to the formation of hurricanes.
Ahead of the beginning of this year's Atlantic hurricane season, weather organizations forecast above-normal activity, referencing elevated ocean temperatures and potential stronger monsoon activity around African coastal regions - where Atlantic storms typically originate.
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