Forecasters in the US have warned that Hurricane Igor has rapidly strengthened to a category four storm in the open Atlantic, though it doesn't immediately threaten land.
Igor has maximum sustained winds of 135mph and is moving west at 14mph. Some additional strengthening is expected in the next two days.
The centre of the storm is located about 1,120 miles east of the Northern Leeward Islands.
Meanwhile, a tropical depression off the coast of Africa has prompted officials to issue a tropical storm warning for parts of the Cape Verde Islands.
Forecasters warned the newly formed depression could strengthen into a tropical storm as early as Sunday night. The storm warning was issued for the southern Cape Verde Islands, including Maio, Sao Tiago, Fogo and Brava.