Hurricane Melissa is predicted to strengthen into a rare Category 5 storm as it turns toward Jamaica, causing deadly sudden floods and rock falls.
The hurricane, which recorded wind speeds of up to 120 mph as of 06:00 GMT, is presently veering north-west in the Caribbean and is projected to make landfall by early next week, based on data from weather experts.
Advisories of electricity outages and damage to infrastructure have been released as the hurricane brings up to thirty inches of precipitation and sea level surges as high as 4m above normal levels. "Seek shelter now," residents have been told.
Melissa is the 13th named cyclone in the current Atlantic hurricane season, which normally finishes in late autumn.
A highest-level cyclone is the most powerful category, with winds of at least 252 km/h.
Even though Melissa is expected to reduce in intensity to a Category 4 cyclone before reaching Jamaica, authorities said there was "very little practical difference in the total effects" upon landfall, and that the hurricane will be "equally strong" when it strikes the island.
With storm-force winds and rain predicted to begin ahead of it passes over central Jamaica - perhaps encompassing the national capital - advisories emphasize that "readiness efforts must be accelerated".
"A multi-day period of damaging winds and intense precipitation have begun and will cause catastrophic and life-threatening sudden floods and multiple landslides," counseled meteorological officials.
The country's head of government the official said: "I realize that there are countless citizens who are worried, who are extremely apprehensive, and rightfully so: you should be concerned.
"But the best way to manage anxiety and any apprehension and worry is to be prepared."
Inhabitants are being told to secure their homes with protective bags and wooden boards, and to stock up on necessary supplies.
Advisories are also in effect for parts of the neighboring country encompassing the main city, Port au Prince, the adjacent nation and Cuba's eastern region, where the hurricane is projected to bring similar effects by the midweek period.
Landslides presently generated by the hurricane have resulted in two fatalities in Haiti, according to local authorities.
The hurricane is forecast to pass over the island nation by midweek before passing across the Antillas Mayores and emerging into the open ocean.
By the moment it reaches Cuba, it is predicted to have reduced to a third-level cyclone.
While it is difficult to connect specific storms to environmental shifts, researchers say it is making meteorological events increasingly frequent and more severe.
Higher ocean heat produce more moisture in the atmosphere, contributing to the formation of storms.
Ahead of the commencement of this season's Caribbean cyclone season, climate agencies predicted higher-than-average occurrence, citing heated marine conditions and likely stronger monsoon activity around African coastal regions - where Atlantic storms often form.
Giornalista freelance con 10 anni di esperienza, specializzata in divulgazione scientifica e innovazione tecnologica.