Hurricane Melissa is forecast to become a major hurricane on Sunday with catastrophic flash flooding and landslides in Haiti, the Dominican Republic and Jamaica.

According to the National Hurricane Center's 4 a.m. Sunday advisory, Category 3 Hurricane Melissa is in the Caribbean Sea, 125 miles south-southeast of Kingston Jamaica and 280 miles west-southwest of Port Au Prince Haiti. The hurricane is moving to the west at 3 mph, with maximum sustained winds of 115 mph.

The base commander on Saturday expanded a previous evacuation order to include “non-mission-essential U.S. citizens.”

Tropical Storm Melissa is lumbering through the Caribbean Sea and bringing a risk of dangerous landslides and life-threatening flooding to Jamaica and southern Hispaniola