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Cyclone the storm is projected to escalate to a uncommon highest-level cyclone as it turns toward the Caribbean island, bringing deadly rapid inundation and rock falls.

The hurricane, which registered wind speeds of up to 195 km/h as of 0600 Greenwich Mean Time, is now shifting northwest in the Caribbean and is anticipated to hit the coast by midweek, based on data from weather experts.

Alerts of electricity outages and damage to infrastructure have been released as Melissa generates up to 30 inches of rain and sea level surges as high as 4m above normal levels. "Find safe refuge immediately," locals have been advised.

Melissa is the 13th hurricane in the current Atlantic storm period, which usually concludes in late autumn.

Highest-Level Storm Threat

A Category 5 hurricane is the most intense classification, with wind speeds of at least 157mph.

Although this storm is set to reduce in intensity to a Category 4 storm before arriving at Jamaica, meteorologists said there was "very little practical difference in the total effects" upon reaching the coast, and that the storm will be "at least that intensity" when it hits the island.

Critical Readiness Measures

With storm-force wind and rainfall already expected long before it moves across central Jamaica - including potentially the city of Kingston - warnings emphasize that "safety measures need to be finalized quickly".

"A multi-day period of destructive gusts and intense precipitation are underway and will cause severe and deadly rapid water accumulation and many landslides," urged weather authorities.

Jamaican Prime Minister the official stated: "I understand that there are numerous residents who are anxious, who are very concerned, and rightfully so: you should be concerned.

"Yet the most effective method to manage nervousness and any apprehension and anxiety is to be prepared."

Residents are being instructed to fortify their houses with sandbags and timber panels, and to stock up on necessary supplies.

Regional Effects

Alerts are also ongoing for areas in Haiti including the main city, Port au Prince, the Dominican Republic and eastern Cuba, where Melissa is expected to bring similar effects by the middle of next week.

Landslides already being caused by the hurricane have caused two deaths in Haiti, according to the nation's Civil Protection agency.

Projected Course

The hurricane is projected to move across Cuba by midweek before passing across the Antillas Mayores and emerging into the Atlantic.

By the moment it arrives at the Caribbean nation, it is predicted to have weakened to a category three hurricane.

Environmental Context

Although it is difficult to associate individual weather events to environmental shifts, scientists say it is causing meteorological events more common and more intense.

Higher ocean heat generate additional humidity in the air, helping fuel the development of storms.

Before the beginning of this season's Atlantic storm period, meteorological authorities forecast above-normal activity, mentioning heated marine conditions and possible stronger monsoon activity around African coastal regions - where Atlantic storms typically originate.