Hurricane Melissa has intensified into a category 4 hurricane, and could develop further to become a category 5 as it approaches Jamaica, according to the National Hurricane Center.

Tropical Storm Melissa has strengthened into a hurricane and is expected to become a major hurricane by the end of the weekend, the U.S. National Hurricane Center said on Saturday.

"We will be very fortunate if Melissa does not cause a humanitarian disaster in the northern Caribbean next week," said Dr. Ryan Truchelut, chief meteorologist at WeatherTiger, who works with the USA...