Forty-eight hours after an earthquake devastated the Haitian capital of Port-au-Prince, the first emergency assessment teams were yesterday still trying to establish just how many people had died. The sketchy picture from the area underlined the mammoth task facing an international rescue mission that swung into action yesterday. After Haitians spent a second night in the open, they resumed searching for survivors in the rubble of the capital's streets, which were still without water and electricity. Eyewitnesses said most of the buildings where the cries of survivors had been heard on Wednesday were ominously silent by yesterday morning. They added that with few options regarding the bodies, people were gathering corpses into piles on the city's shattered streets. Geoffrey Dennis, UK chief executive for Care International, which has 134 long-term employees in Haiti, said 30,000 to 50,000 people had died and "hundreds of millions of dollars" in relief and rehabilitation funds over the next three years would be required from the international community. But Ban Ki-moon, United Nations secretary-general, said any casualty estimate now could be no more than an educated guess. Kim Bolduc, a UN development official, said by videolink from Port-au-Prince that $10m (