Hurricane the storm is predicted to strengthen into a infrequent Category 5 storm as it veers in the direction of Jamaica, delivering dangerous rapid inundation and mudslides.
The hurricane, which registered wind speeds of up to 120 mph as of 0600 Greenwich Mean Time, is currently turning toward the northwest in the Caribbean and is projected to make landfall by Tuesday, based on data from weather experts.
Warnings of blackouts and structural damage have been issued as this storm brings up to thirty inches of rainfall and coastal flooding as high as 13ft above normal levels. "Take cover without delay," inhabitants have been advised.
This hurricane is the thirteenth cyclone in the current Atlantic season, which usually concludes in November.
A Category 5 hurricane is the most intense classification, with sustained winds of at least 252 km/h.
While Melissa is expected to weaken to a category four storm before reaching the island, authorities said there was "almost no noticeable change in the total effects" upon reaching the coast, and that the cyclone will be "equally strong" when it strikes the country.
With storm-force winds and rain already expected long before it crosses the island's interior - possibly even the national capital - alerts emphasize that "preparations should be rushed to completion".
"A multi-day period of damaging winds and intense precipitation are underway and will cause severe and deadly sudden floods and many landslides," advised climate experts.
Jamaican Prime Minister the official stated: "I understand that there are countless citizens who are anxious, who are deeply troubled, and with good reason: you should be concerned.
"But the most effective method to handle worry and any unease and anxiety is to stay ready."
Locals are being told to secure their homes with sand barriers and wooden boards, and to gather necessary supplies.
Advisories are also active for parts of the neighboring country encompassing the main city, Port au Prince, the adjacent nation and the eastern part of Cuba, where Melissa is expected to bring similar effects by the middle of next week.
Mudslides currently triggered by the cyclone have caused two deaths in the country, according to emergency services.
This weather system is forecast to pass over Cuba by the middle of the week before traveling via the Antillas Mayores and entering the Atlantic.
By the time it reaches the Caribbean nation, it is anticipated to have diminished to a third-level hurricane.
Even though it is challenging to link specific storms to climate change, experts say it is causing weather phenomena more prevalent and more extreme.
Increased sea temperatures generate additional humidity in the air, aiding in the development of hurricanes.
Prior to the commencement of this year's Caribbean cyclone season, meteorological authorities projected increased storm frequency, citing warmer seas and likely stronger monsoon activity around the western African continent - where hurricanes often form.
Lena is an environmental scientist and writer passionate about promoting sustainable practices through accessible, evidence-based content.