Cyclone the storm is predicted to escalate to a uncommon highest-level cyclone as it veers toward the Caribbean island, bringing life-threatening flash flooding and mudslides.
The cyclone, which recorded wind speeds of up to 195 km/h as of 6:00 AM GMT, is presently veering northwest in the Caribbean and is anticipated to reach land by Tuesday, according to weather experts.
Warnings of electricity outages and disruption to utilities have been issued as this storm generates up to thirty inches of precipitation and coastal flooding as high as thirteen feet above normal levels. "Find safe refuge immediately," inhabitants have been urged.
Melissa is the 13th named cyclone in the current Atlantic season, which usually concludes in the eleventh month.
A highest-level cyclone is the strongest type, with wind speeds of at least 157 miles per hour.
Even though the hurricane is expected to reduce in intensity to a fourth-level storm before making landfall on Jamaica, authorities said there was "almost no noticeable change in the general consequences" upon landfall, and that the storm will be "just as powerful" when it hits the island.
With storm-force winds and rain already expected long before it moves across central Jamaica - possibly even the national capital - advisories state that "preparations should be rushed to completion".
"A multi-day period of damaging winds and heavy rainfall have begun and will cause severe and deadly rapid water accumulation and multiple rock slides," advised meteorological officials.
Jamaican Prime Minister the official said: "I know that there are countless citizens who are worried, who are deeply troubled, and with good reason: concern is justified.
"However the most effective method to manage anxiety and any apprehension and anxiety is to be prepared."
Residents are being told to secure their homes with sand barriers and plywood sheets, and to stock up on essentials.
Alerts are also in effect for regions of the neighboring country encompassing the primary urban center, the adjacent nation and Cuba's eastern region, where Melissa is expected to bring similar effects by the midweek period.
Landslides presently generated by the cyclone have already killed two in the country, according to the nation's Civil Protection agency.
The hurricane is forecast to move across the island nation by the middle of the week before moving through the Greater Antilles and entering the open ocean.
By the point it arrives at the Caribbean nation, it is anticipated to have weakened to a third-level hurricane.
While it is difficult to associate specific storms to climate change, researchers say it is resulting in climate patterns more common and more severe.
Warmer oceans produce greater water vapor in the air, aiding in the creation of tropical cyclones.
Before the start of this year's Atlantic hurricane season, weather organizations predicted increased storm frequency, citing heated marine conditions and possible stronger monsoon activity around African coastal regions - where Atlantic storms typically originate.
Elena Voss is a tech enthusiast and writer with over a decade of experience in software development and digital media.