Tropical Storm the storm is predicted to escalate to a uncommon category five hurricane as it veers toward Jamaica, bringing deadly rapid inundation and mudslides.
The hurricane, which had wind speeds of up to 195 km/h as of 6:00 AM GMT, is currently turning northwest in the Caribbean region and is expected to reach land by early next week, according to meteorological authorities.
Warnings of power cuts and damage to infrastructure have been released as the hurricane generates up to 76cm of rain and coastal flooding as high as 4m above typical tides. "Take cover without delay," inhabitants have been urged.
Melissa is the 13th named cyclone in the ongoing Atlantic hurricane season, which usually concludes in the eleventh month.
A category five cyclone is the strongest type, with wind speeds of at least 252 km/h.
Even though this storm is expected to diminish in strength to a category four cyclone before reaching the island, experts said there was "minimal real distinction in the total effects" upon making contact with land, and that the hurricane will be "just as powerful" when it impacts the nation.
With tropical storm-level gusts and precipitation anticipated well in advance long before it passes over the island's interior - including potentially the city of Kingston - warnings state that "preparations should be rushed to completion".
"Several days of destructive gusts and intense precipitation have begun and will cause devastating and dangerous rapid water accumulation and multiple rock slides," counseled weather authorities.
The nation's leader the official commented: "I know that there are numerous residents who are concerned, who are extremely apprehensive, and appropriately: concern is justified.
"But the optimal approach to manage anxiety and any nervousness and anxiety is to remain prepared."
Residents are being instructed to secure their homes with protective bags and plywood sheets, and to stock up on basic necessities.
Alerts are also active for areas in Haiti such as the capital, Port au Prince, the adjacent nation and eastern Cuba, where the hurricane is expected to bring similar effects by the middle of next week.
Rock slides presently generated by the hurricane have caused two deaths in the country, according to emergency services.
This weather system is predicted to cross Cuba by midweek before moving through the Caribbean archipelago and emerging into the Atlantic Ocean.
By the point it arrives at the Caribbean nation, it is predicted to have reduced to a Category 3 hurricane.
Even though it is hard to associate particular meteorological occurrences to climate change, researchers say it is making weather phenomena increasingly frequent and more intense.
Warmer oceans create greater water vapor in the environment, aiding in the formation of hurricanes.
Prior to the start of this year's Caribbean cyclone season, climate agencies projected higher-than-average occurrence, mentioning warmer seas and possible enhanced seasonal rains around African coastal regions - where Atlantic storms frequently develop.
Elias Vance is a Canadian journalist and political analyst with over a decade of experience covering national affairs and policy developments.