Historic, life-threatening flash flooding and landslides are expected in portions of Jamaica, southern Haiti and the Dominican Republic through the weekend, the NHC said. Peak storm surge heights could reach 9 to 13 feet above normal tide levels when the storm makes landfall, accompanied by large and powerfully destructive waves.

Celebrity Beyond’s Oct. 26 itinerary will visit the Western Caribbean rather than the Eastern Caribbean, according to the cruise line’s parent company, Royal Caribbean Group. The ship will visit Costa Maya in Mexico, Belize and Roatan, Honduras.

Cuba is bracing for Hurricane Melissa as it heads towards Santiago de Cuba, the island’s second-largest city, threatening catastrophic damage at a time the government is already failing to provide the most basic services and thousands are sick because of the rise of mosquito-transmitted diseases and other illnesses linked to poor sanitary conditions.

Jamaica is expected to be in the storm's eyewall, which refers to the band of dense clouds surrounding the eye of the hurricane. The eyewall generally produces the fiercest winds and heaviest rainfall, according to Deanna Hence, a professor of climate, meteorology and atmospheric sciences at the University of Illinois Urbana-Champaign.

Hurricane Hunters were forced to cut short their reconnaissance mission into the Category 5 Hurricane Melissa Monday morning, Oct. 27.