Caribbean nations are warning residents to make emergency preparations with a powerful and potentially deadly hurricane strengthening further as it moves towards them.Beryl, the first named hurricane of the season, is due to make landfall over a number of islands late on Sunday.The hurricane has been upgraded by forecasters to a “very dangerous” category three storm – meaning it is predicted to have winds of 111-130mph (179-209km/h).The major storm is expected to strengthen further as nears the Caribbean islands of Barbados, Dominica, Grenada and Martinique, among others.Across the region,…