The storm is expected to hit Jamaica, Haiti and the Dominican Republic, as well as Cuba, the Bahamas, and the Turks and Caicos.

At 11 a.m. Saturday, the National Hurricane Center issued an advisory stating that Tropical Storm Melissa is in the Caribbean Sea, 155 miles southeast of Kingston Jamaica and 235 miles southwest of Port Au Prince Haiti. The system, with maximum sustained winds of 70 mph, is moving west-northwest at 1 mph.

Tropical Storm Sonia is churning in the Pacific Ocean and isn’t threatening land. The U.S. National Hurricane Center says the storm formed over the weekend and on Monday was about 965 miles southwest of the southern tip of Mexico’s Baja California peninsula.

Melissa has already killed three people in Haiti and Jamaica each and one person in the Dominican Republic. United Nations staff are preparing to deploy to Cuba and Jamaica this week as the region nervously awaits landfall of Hurricane Melissa.