Hurricane Melissa is forecast to become a rare highest-level storm as it turns in the direction of Jamaica, bringing life-threatening sudden floods and mudslides.
The hurricane, which registered winds of up to 120 mph as of 06:00 GMT, is presently veering toward the northwest in the Caribbean and is projected to reach land by midweek, according to hurricane specialists.
Alerts of power cuts and disruption to utilities have been announced as Melissa generates up to 30 inches of precipitation and coastal flooding as high as 13ft above ground. "Seek shelter now," inhabitants have been told.
This hurricane is the 13th named storm in the ongoing Atlantic hurricane season, which usually concludes in late autumn.
A category five cyclone is the strongest type, with wind speeds of at least 252 km/h.
While Melissa is projected to weaken to a category four storm before arriving at the island, authorities said there was "very little practical difference in the overall impacts" upon making contact with land, and that the cyclone will be "just as powerful" when it hits the country.
With storm-force wind and rainfall predicted to begin ahead of it moves across central Jamaica - including potentially the national capital - advisories indicate that "preparations should be rushed to completion".
"A multi-day period of destructive gusts and heavy rainfall have begun and will cause devastating and dangerous rapid water accumulation and multiple landslides," advised climate experts.
The country's head of government Andrew Holness said: "I know that there are numerous residents who are concerned, who are very concerned, and with good reason: worry is natural.
"But the best way to manage worry and any unease and anxiety is to remain prepared."
Locals are being told to protect their properties with sand barriers and timber panels, and to gather basic necessities.
Alerts are also in effect for areas in Haiti such as the main city, Port au Prince, the Dominican Republic and eastern Cuba, where this storm is expected to bring similar effects by the midweek period.
Landslides currently triggered by the cyclone have already killed two in the country, according to the nation's Civil Protection agency.
This weather system is projected to cross Cuba by midweek before traveling via the Caribbean archipelago and emerging into the Atlantic.
By the moment it makes contact with Cuba, it is anticipated to have weakened to a category three cyclone.
Even though it is challenging to connect specific storms to climate change, researchers say it is causing climate patterns increasingly frequent and more intense.
Warmer oceans generate more moisture in the environment, aiding in the development of tropical cyclones.
Ahead of the commencement of the current Atlantic storm period, meteorological authorities predicted above-normal activity, mentioning warmer seas and likely enhanced seasonal rains around the western African continent - where hurricanes frequently develop.
A seasoned sports analyst and casino reviewer with over a decade of experience in the Canadian gambling industry.