Tropical Storm the storm is forecast to become a uncommon Category 5 cyclone as it shifts in the direction of the Caribbean island, bringing dangerous rapid inundation and rock falls.
The hurricane, 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 expected to hit the coast by early next week, as reported by meteorological authorities.
Advisories of power cuts and structural damage have been released as the hurricane produces up to 76cm of rain and sea level surges as high as thirteen feet above typical tides. "Find safe refuge immediately," inhabitants have been advised.
Melissa is the 13th cyclone in the ongoing Atlantic storm period, which normally finishes in the eleventh month.
A category five cyclone is the most intense classification, with sustained winds of at least 252 km/h.
While this storm is set to weaken to a category four cyclone before arriving at the island, authorities said there was "very little practical difference in the overall impacts" upon reaching the coast, and that the hurricane will be "just as powerful" when it impacts the island.
With storm-force gusts and precipitation already expected long before it moves across the island's interior - possibly even the city of Kingston - alerts indicate that "preparations should be rushed to completion".
"An extended timeframe of destructive gusts and torrential rain have begun and will cause severe and deadly flash flooding and many rock slides," advised meteorological officials.
The country's head of government the official stated: "I know that there are numerous residents who are anxious, who are extremely apprehensive, and rightfully so: worry is natural.
"However the best way to handle anxiety and any unease and worry is to be prepared."
Residents are being told to secure their homes with protective bags and wooden boards, and to stock up on basic necessities.
Alerts are also in effect for regions of the neighboring country encompassing the primary urban center, the neighboring country and Cuba's eastern region, where Melissa is expected to bring similar effects by the midweek period.
Landslides already being caused by the hurricane have already killed two in Haiti, according to emergency services.
Melissa is predicted to pass over the island nation by midweek before passing across the Caribbean archipelago and entering the open ocean.
By the moment it makes contact with the Caribbean nation, it is forecast to have weakened to a category three cyclone.
Even though it is hard to link particular meteorological occurrences to global warming, experts say it is causing climate patterns more prevalent and more severe.
Higher ocean heat create more moisture in the atmosphere, aiding in the formation of storms.
Before the commencement of this season's Atlantic hurricane season, meteorological authorities forecast higher-than-average occurrence, citing warmer seas and potential stronger monsoon activity around the western African continent - where hurricanes frequently develop.
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