The US National Hurricane Centre says the category five storm is "extremely dangerous and life-threatening" as it hits the island.

With Hurricane Melissa moving at speeds of 175 miles per hour and preparing to make landfall on the island nation of Jamaica by the afternoon of Oct. 28, governments are warning their citizens to put off travel, while airlines and cruise lines are calling off trips.

The U.S. Air Force Reserve's 53rd Weather Reconnaissance Squadron, known as the "Hurricane Hunters," were forced to turn back at one point due to heavy turbulence after flying into the eye of Hurricane Melissa on Monday.

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.

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.