New figures reveal at least 114,000 people died in Sunday's ocean disaster, as aid agencies struggle to provide relief to the Indian Ocean region.
Officials in Indonesia say the number killed there is now nearly 80,000 and the death toll from the worst-hit area is set to rise still higher.
UN Secretary-General Kofi Annan said the disaster was unprecedented and required an unprecedented response.
The entire UN family was ready to help people rebuild their lives, he said.
Millions who survived the waves now have little water, food or shelter.
Relief teams and supplies are pouring into the region but have yet to reach the hardest-hit and most remote areas.
There are reports of desperate people fighting over aid. Aftershocks and fears of new tsunamis have sown panic among survivors in Indonesia and India.
Across the region thousands remain unaccounted for since the 9.0 magnitude undersea earthquake off Sumatra that forced a wall of water smashing into coastlines as far away as east Africa.
The US, Australia, Japan and India have formed a coalition to provide relief.
The World Bank has announced that it is giving $250m to help victims while the UK increased its contribution to $96m, making it the biggest donation from an individual country.
City of corpses
Health ministry officials in Indonesia put the new death toll at 79,940.
NATURAL DISASTERS
They explained that the figure had jumped by more than 20,000 after large numbers of bodies were found on Sumatra's remote north-west coast, the area of land closest to the epicentre of the earthquake that triggered the waves.
Government institutions in the region have collapsed and fuel supplies have almost run out, officials said.
The BBC's Andrew Harding in Banda Aceh says relief supplies are barely trickling into the city where drinking water is also scarce and corpses clog the streets.
A logistical nightmare awaits the massive aid operation, he says.
FOREIGNERS MISSING AND DEAD
"There is no food here whatsoever. We need rice. We need medicine. I haven't eaten in two days," a local woman told Reuters news agency.
A lone airport serves the entire region and road links to many remote areas have been washed away by sea waters.
On Thursday, aftershocks off Indonesia triggered fresh panic among survivors in Aceh.
Frustration
Rumours of impending waves quickly spread to the two other countries which bore the brunt of Sunday's tsunamis - India and Sri Lanka.
KEY AID PLEDGES
Officials of the World Health Organization say as many as five million people are at risk throughout the region because they are unable to get water, food or adequate sanitation.
Several countries have seen their infrastructure shattered; countless roads and bridges have been swept away.
Stockpiles of supplies have begun to mount at some airports and distribution centres, where airlifts of aid have been held up by a shortage of helicopters.
The UN's relief co-ordinator, Jan Egeland, has said it will take another "two or three days" for the relief effort to get into full swing - by which time it may be too late for tens of thousands of people.
"We are doing very little at the moment," he said.
"I believe the frustration will be growing in the days and weeks ahead."
There are fears that epidemics will erupt because water supplies have been contaminated.
CONFIRMED DEATH TOLLS|
1. Indonesia: 79,940 2. Sri Lanka: 24,743 3. India (inc Andaman and Nicobar Is): 7,330 4. Thailand: 2,394 |
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5. Somalia: 120 6. Burma: 90 7. Maldives: 67 8. Malaysia: 65 |
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9. Tanzania: 10 10. Seychelles: 1 11. Bangladesh: 2 12. Kenya: 1 |
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