A Haitian boy carries a plastic basin on top of his head to shield himself from the rain of Tropical Storm Isaac outside Port-au-Prince August 25, 2012. Tropical Storm Isaac emerged over warm Caribbean waters on Saturday slightly weaker but ready to regroup after dumping torrential rains on Haiti, where thousands of people remain homeless more than two years after a devastating earthquake. REUTERS/Swoan Parker (HAITI - Tags: DISASTER ENVIRONMENT)