Heavy rains were forecast to start late Friday in Antigua and Barbuda, the U.S. and British Virgin Islands and southern and eastern Puerto Rico.

As of Friday evening, Hurricane Erin had strengthened into a Category 2 storm with maximum sustained winds of up to 100 mph and "expected to rapidly intensify into a major hurricane this weekend," the National Hurricane Center said at 11 p.m. ET.

According to AccuWeather, Hurricane Erin is expected to strengthen rapidly over the weekend, and could intensify into a major Category 4 storm.