BANDA ACEH, Indonesia - Thousands of bodies lay rotting and unidentified on lawns and streets of battered Sumatra island and authorities called out bulldozers to dig mass graves, as the number killed in a mammoth earthquake and tsunami soared above 58,000 with tens of thousands still missing.
The U.N. health agency warned that disease could double the toll yet again.
Across a dozen countries, millions of people whose homes were swept away or wrecked by raging walls of water Sunday struggled to find shelter.
‘‘My mother, no word! My sisters, brothers, aunt, uncle, grandmother, no word!’’ yelled a woman at a makeshift morgue in Lhokseumawe, Indonesia. ‘‘Where are they? Where are they? I don’t know where to start looking.’’
Along India’s southeastern coast, hospital teams stood by to help the injured, but three days after the disaster still spent most of their time tabulating the dead as ambulances hauled in more bodies. A French cultural center in Thailand’s capital provided clothes and food for tourist families left with nothing when the sea battered southern beach resorts.
Indonesia’s Health Ministry said in a statement early today that thousands more bodies had been recovered, raising to more than 30,000 the number of confirmed deaths in parts of Sumatra island, the territory closest to the epicenter of the quake that sent the tsunami rolling across the Indian Ocean. The count did not include a report of thousands more dead in the region around one coastal city.
Sri Lanka listed 21,700 people dead, India 4,400 and Thailand 1,500, with the toll expected to rise. A total of more than 300 were killed in Malaysia, Myanmar, Bangladesh, the Maldives, Somalia, Tanzania, Seychelles and Kenya.
Officials had not yet counted the dead in two zones that suffered the brunt of the earthquake and the tsunami that followed: The west coast of Sumatra and India’s remote Andaman and Nicobar archipelagos just north of Sumatra.
Purnomo Sidik, national disaster director at Indonesia’s Social Affairs Ministry, said 10,000 people had been reported killed in and around Meulaboh, a poor Sumatran town where most people fish for a living or work on palm oil plantations. In India, police said 8,000 people were missing and feared dead on the two island chains.
Television footage from overflights of Meulaboh and other parts of Sumatra’s west coast showed thousands of homes under water. Refugees fleeing the coast described surviving on little more than coconuts before reaching Banda Aceh, the capital of Aceh province on Sumatra’s northern tip, which itself was largely flattened by the quake.
‘‘The sea was full of bodies,’’ said one refugee, Sukardi Kasdi, who sailed a small boat to Banda Aceh to seek help for his family in Surang.
He said his family had nothing to eat but coconuts. ‘‘I don’t know how long everyone else will survive,’’ he said.
With aid not arriving quickly enough, desperate people in Meulaboh and other towns in Aceh were stealing whatever food they could find, officials said.
‘‘People are looting, but not because they are evil, but they are hungry,’’ said Red Cross official Irman Rachmat in Banda Aceh.
The flooding uprooted land mines in Sri Lanka — torn for years by a civil war — threatening to kill or maim aid workers and survivors attempting to return to what’s left of their homes.
Aid groups struggled to mount what they described as the largest relief operation the world has ever seen, and to head off the threat of cholera and malaria epidemics that could break out where water supplies are polluted with bodies and debris.
Dr. David Nabarro, head of crisis operations for the World Health Organization, warned that disease could take as many lives as Sunday’s devastation.
‘‘The initial terror associated with the tsunamis and the earthquake itself may be dwarfed by the longer term suffering of the affected communities,’’ he told reporters at the U.N. agency’s offices in Geneva.
A government official in India said Sunday’s devastation had overwhelmed authorities, who were only now getting relief operations under control and starting to address health concerns.
‘‘It was all sudden and unexpected. There were just too many bodies to recover,’’ Veera Shanmuga Moni said. ‘‘Now that we are close to finishing that job, we will now take care of sanitation and supply of clean water.’’
Amid the devastation, however, there were miraculous stories of survival. In Malaysia, a 20-day-old baby was found alive on a floating mattress and was reunited with her family.
In Thailand, 2-year-old Hannes Bergstroem, who was found dazed and alone after the waves hit, was claimed by an uncle after his photograph was posted on the Internet.
A U.N. agency has said that one-third of the disaster’s victims were children.