Powerful Hurricane Igor is moving west-northwest in the Atlantic on a track that could take the Category 4 storm toward Bermuda.
Maximum sustained winds are near 135 mph with higher gusts.
On Tuesday morning the slow-moving storm was centered about 710 miles east of the Northern Leeward Islands, moving at about 7 mph.
The National Hurricane Center in Miami says swells from Igor will begin affecting the Leeward Islands on Tuesday, and reach into Puerto Rico and the Virgin Islands on Tuesday night and Wednesday with life-threatening surfa nd rip currents.
Forecasters say fluctuations in the storm's intensity are possible over the next two days, but they expect Igor to remain a dangerous hurricane through Thursday.
Meanwhile, far out over the Atlantic, Hurricane Julia is continuing to strengthen after becoming the fifth hurricane of the season.
Julia has maximum sustained winds Tuesday of 85 mph with some additional strengthening expected during the next day or so.
The hurricane is located about 355 miles west-northwest of the Cape Verde Islands and is moving west-northwest near 10 mph.