 Experts say Beryl's strength comes from the warmest waters ever recorded in the deep Atlantic so early in the year. Barbados, St Vincent and Grenada are among the islands under hurricane warnings. St Vincent's Prime Minister, Ralf Gonsalves, says shelters will open on Sunday evening. In Barbados, people are boarding up their homes and thronging grocery shops and petrol pumps, as Prime Minister Mia Motley urged citizens to look out for their neighbours. Some cricket fans in the region for the T20 World Cup have rushed to leave.