Washington sent an aircraft carrier battle group capable of making clean water to Sumatra, site of at least 80,000 fatalities and several nations dispatched military hospital ships to some of the 11 hard-hit countries, Sky News reported.

Indonesian leaders, meanwhile, agreed to host an international summit next week to organize and coordinate emergency assistance and long-term reconstruction aid.

The World Health Organization said as many as 5 million people were without essential food and water supplies and the United Nations warned diarrhea threatens hundreds of thousands of South Asian children.

The World Bank has offered $250 million for relief, bringing world aid contributions to around $500 million.

Some of that aid is being refused. Thousands of Indians went hungry in southern Tamil Nadu state as the country declined foreign aid, excluding U.N. agencies and non-government organizations already present.

An underwater earthquake Sunday measuring 9.0 on the Richter scale off the Indonesian island of Sumatra triggered the deadly tsunamis.