New figures reveal at least 114,000 people died in Sunday's ocean disaster.
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.
Aid workers are meanwhile struggling to reach the millions who survived the devastating waves but who 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.
Click here for map of affected area
The US, Australia, Japan and India have formed a coalition to provide relief.
Foreign governments have pledged more than $220m in aid - $35m of which is promised by the US.
Source