Cyclone the storm is forecast to strengthen into a infrequent category five cyclone as it shifts towards the Caribbean island, causing deadly rapid inundation and rock falls.
This weather system, which recorded wind speeds of up to 120 mph as of 06:00 GMT, is currently turning northwest in the Caribbean region and is anticipated to make landfall by early next week, based on data from weather experts.
Alerts of blackouts and disruption to utilities have been announced as the hurricane brings up to thirty inches of rain and sea level surges as high as 4m above ground. "Seek shelter now," locals have been told.
The cyclone is the 13th hurricane in the ongoing Atlantic storm period, which usually concludes in the eleventh month.
A category five cyclone is the most intense classification, with sustained winds of at least 252 km/h.
Even though this storm is expected to diminish in strength to a Category 4 cyclone before arriving at Jamaica, experts said there was "almost no noticeable change in the general consequences" upon landfall, and that the hurricane will be "at least that intensity" when it strikes the island.
With storm-force gusts and precipitation predicted to begin ahead of it crosses the island's interior - perhaps encompassing the national capital - warnings state that "readiness efforts must be accelerated".
"An extended timeframe of harmful winds and torrential rain are underway and will cause catastrophic and life-threatening rapid water accumulation and multiple mudslides," advised meteorological officials.
Jamaican Prime Minister Andrew Holness commented: "I know that there are countless citizens who are concerned, who are very concerned, and with good reason: concern is justified.
"But the optimal approach to manage worry and any apprehension and anxiety is to be prepared."
Inhabitants are being instructed to protect their properties with sandbags and wooden boards, and to stock up on basic necessities.
Advisories are also active for regions of the neighboring country including the main city, Port au Prince, the Dominican Republic and eastern Cuba, where this storm is expected to bring analogous consequences by the middle portion of the coming week.
Mudslides presently generated by the hurricane have resulted in two fatalities in the country, according to emergency services.
Melissa is forecast to cross the island nation by Wednesday before moving through the Greater Antilles and entering the Atlantic.
By the time it makes contact with Cuba, it is anticipated to have weakened to a category three storm.
Even though it is challenging to link specific storms to climate change, scientists say it is causing climate patterns more prevalent and more severe.
Higher ocean heat produce additional humidity in the atmosphere, contributing to the formation of storms.
Prior to the commencement of this season's Atlantic storm period, climate agencies projected above-normal activity, citing warmer seas and likely more intense weather patterns around African coastal regions - where tropical systems frequently develop.
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