A planeload of water equipment sent by Oxfam will arrive in Sri Lanka tomorrow to provide clean water for 175,000 people affected by the tsunami disaster.
Oxfam Ireland said the search and rescue phase is now drawing to a close in Sri Lanka and rehabilitation will commence shortly.
"Oxfam assessment teams are currently hard at work building up data on the quantity and location of need, in particular concentrating upon the provision of clean water and sanitation," a statement said.
More than one million people in Sri Lanka have been displaced by the disaster, and are now surviving in 750 camps.
Local businesses in Sri Lanka have donated bottled water for those people lacking access to either existing or emergency water supplies.
Oxfam said its staff in the area are mostly local, many of whom have continued to work to save their neighbours despite having in several cases lost their own homes.
The aid agency said access to Aceh province in Indonesia remains very difficult and that there are still "no definite figures" on the loss of life.
The east coast of Aceh has also been hit, with the town of Lhokseumawe having lost 200 people, Oxfam said. Some 20,000 are homeless.
Also on the east coast, Pidie/Sigli has not yet received any outside help. Meulaboh, on the west coast of Aceh has also received no outside assistance.
Oxfam said its assessment team has rented a helicopter for rapid access throughout the affected areas.