Cyclone Melissa is forecast to become a infrequent highest-level storm as it veers towards the Caribbean island, causing life-threatening sudden floods and landslides.
This weather system, which had winds of up to 120 miles per hour as of 6:00 AM GMT, is now shifting toward the northwest in the Caribbean and is anticipated to hit the coast by Tuesday, based on data from weather experts.
Alerts of blackouts and structural damage have been issued as this storm generates up to 30 inches of rain and coastal flooding as high as 4m above typical tides. "Seek shelter now," locals have been told.
This hurricane is the thirteenth cyclone in this year's Atlantic season, which usually concludes in late autumn.
A Category 5 cyclone is the strongest type, with winds of at least 157mph.
While the hurricane is projected to weaken to a category four storm before making landfall on Jamaica, authorities said there was "very little practical difference in the total effects" upon reaching the coast, and that the hurricane will be "equally strong" when it strikes the country.
With tropical storm-level gusts and precipitation already expected ahead of it crosses Jamaica's central region - including potentially the capital, Kingston - advisories emphasize that "safety measures need to be finalized quickly".
"Several days of harmful winds and heavy rainfall have begun and will cause severe and deadly rapid water accumulation and multiple landslides," counseled meteorological officials.
The nation's leader Andrew Holness stated: "I know that there are numerous residents who are anxious, who are very concerned, and with good reason: concern is justified.
"Yet the most effective method to manage worry and any unease and concern is to stay ready."
Inhabitants are being instructed to secure their homes with sandbags and timber panels, and to stock up on essentials.
Alerts are also ongoing for areas in Haiti encompassing the primary urban center, the adjacent nation and Cuba's eastern region, where this storm is anticipated to bring similar effects by the midweek period.
Rock slides already being caused by the cyclone have caused two deaths in Haiti, according to the nation's Civil Protection agency.
Melissa is predicted to cross the island nation by Wednesday before traveling via the Antillas Mayores and emerging into the Atlantic.
By the moment it makes contact with Cuba, it is predicted to have reduced to a category three cyclone.
While it is challenging to link specific storms to environmental shifts, experts say it is causing weather phenomena increasingly frequent and more severe.
Increased sea temperatures produce more moisture in the air, helping fuel the creation of storms.
Ahead of the beginning of this year's Caribbean cyclone season, climate agencies projected increased storm frequency, citing warmer seas and possible more intense weather patterns around African coastal regions - where Atlantic storms frequently develop.
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