Dangerous Hurricane Dean threatens Jamaica

KINGSTON (Reuters) - Jamaica urged people to leave low-lying areas and head to evacuation centers on Sunday as powerful Hurricane Dean bore down on the island, after killing at least four people on its path through the Caribbean. 

Dean was a Category 4 hurricane, the second-highest on the five-step Saffir-Simpson scale, as it neared the verdant and mountainous island but it was expected to strengthen into a rare and potentially catastrophic Category 5 as it heads toward Mexico's Yucatan Peninsula on Monday.