NEW: Bermudan officials issue a tropical storm watch
Hurricane center: Rainfall could cause "life-threatening flash floods and mudslides"
The tropical storm could become a hurricane by Monday
Efforts to find three passengers on a downed plane continue despite the weather
Tropical Storm Rafael unleashed heavy rain and powerful gusts to the Virgin Islands and threatened more areas in the Caribbean Sea late Saturday night.
With sustained winds of 50 mph, Rafael could get even stronger as it bears down on several islands popular with tourists.
At that time, the tropical storm was centered about 40 miles west-northwest of St. Marten and 95 miles east of St. Croix. Rafael was moving north at 14 mph.
A projection map shows Rafael headed toward Bermuda later this week.
Officials there issued a tropical storm watch Sunday and told residents that they expected the storm to affect the British territory on Tuesday.
While the National Hurricane Center predicted Rafael will stay well to the east of the Bahamas through Monday, it did warn of life-threatening surf conditions and rip currents on the eastward-facing beaches of the Bahamas over the next few days.
Tropical storm warnings that had been in effect for the U.S. and British Virgin Islands, St. Martin, Antigua, Barbuda, St. Kitts and Guadeloupe were discontinued Sunday morning.
Forecasters expect Rafael to dump between 3 to 5 inches of rain over the Lesser Antilles and Virgin Islands, with some pockets getting as much as 10 inches.
“These rains could cause life-threatening flash floods and mudslides, especially in areas of mountainous terrain,” the hurricane center said.
The storm could impact rescue efforts for two men and one woman whose small aircraft crashed Saturday morning about six nautical miles (7 miles) south of St. Thomas in the U.S. Virgin Islands, Coast Guard spokesman Ricardo Castrodad said. They were aboard a twin-engine Piper PA-23 that left St. Croix destined for St. Thomas, according to Federal Aviation Administration spokeswoman Kathleen Bergen.
Rescue crews from the Coast Guard and U.S. Virgin Islands Department of Natural Resources saved one female passenger, Valerie Jackson, who told them three others were still unaccounted for.
A Coast Guard cutter ship, two helicopters and a fixed-wing aircraft have been dispatched from Puerto Rico for the search, Castrodad said. The effort continued Saturday night despite what the Coast Guard spokesman said were deteriorating conditions due to Rafael.
CNN’s Chandler Friedman contributed to this report.