Tropical Storm the storm is forecast to escalate to a infrequent category five storm as it veers toward Jamaica, causing deadly sudden floods and landslides.
The hurricane, which recorded wind speeds of up to 120 miles per hour as of 0600 Greenwich Mean Time, is currently turning north-west in the Caribbean region and is projected to hit the coast by midweek, as reported by hurricane specialists.
Warnings of blackouts and disruption to utilities have been released as this storm generates up to 76cm of rainfall and sea level surges as high as 13ft above ground. "Seek shelter now," inhabitants have been urged.
The cyclone is the thirteenth hurricane in the current Atlantic storm period, which typically ends in the eleventh month.
A Category 5 hurricane is the strongest type, with winds of at least 157 miles per hour.
Even though the hurricane is projected to weaken to a Category 4 cyclone before reaching Jamaica, experts said there was "minimal real distinction in the overall impacts" upon landfall, and that the hurricane will be "at least that intensity" when it strikes the nation.
With storm-force gusts and precipitation already expected well before it crosses Jamaica's central region - perhaps encompassing the national capital - warnings emphasize that "preparations should be rushed to completion".
"An extended timeframe of destructive gusts and heavy rainfall has started and will cause catastrophic and life-threatening sudden floods and many landslides," counseled weather authorities.
The nation's leader the official stated: "I realize that there are many Jamaicans who are worried, who are very concerned, and with good reason: you should be concerned.
"But the best way to handle anxiety and any unease and concern is to stay ready."
Residents are being advised to secure their homes with protective bags and timber panels, and to accumulate essentials.
Advisories are also active for parts of Haiti encompassing the capital, Port au Prince, the adjacent nation and Cuba's eastern region, where Melissa is expected to bring similar effects by the middle of next week.
Mudslides presently generated by the storm have caused two deaths in the country, according to the nation's Civil Protection agency.
This weather system is predicted to move across the island nation by the middle of the week before passing across the Greater Antilles and out into the Atlantic.
By the moment it reaches the Caribbean nation, it is predicted to have weakened to a third-level cyclone.
Although it is challenging to connect individual weather events to climate change, scientists say it is causing climate patterns more prevalent and more severe.
Increased sea temperatures create additional humidity in the air, contributing to the development of tropical cyclones.
Before the commencement of the current Caribbean cyclone season, weather organizations forecast increased storm frequency, mentioning heated marine conditions and potential more intense weather patterns around the western African continent - where hurricanes often form.
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