More than two million people were displaced by the Asian earthquake and tsunami disaster, and relief agencies have warned the death toll could double from its near 150,000 unless aid reaches them soon.

The most urgent needs are for a clean water supply, medicines, shelter and food, the UN and relief agencies have said.

With more than two billion dollars pledged globally in aid, world leaders attend a major international summit here Thursday to decide how to co-ordinate relief efforts for the 11 mostly Asian countries hit by tsunamis unleashed by
the December 26 temblor.

Here is a country-by-country breakdown of people in need in areas worst affected by the catastrophe.

India: About 370,000 people remain in 532 relief camps spread over southern India and the far-flung Andaman and Nicobar islands. The number of people in camps has dropped from 500,000 last week, but the government lists a total of more than 630,000 as having been moved to safer places who require help getting basic necessities as well as direction on how to apply for aid to rebuild their lives.

Indonesia: Nearly 400,000 people are living in temporary shelters and camps, according to the health ministry. Most were driven or rescued from devastated Aceh province and are now staying in temporary shelters.

Maldives: Some 100,000 people are "severely affected", according to the United Nations, with more than 13,000 people displaced. Several of the 20 atolls have contaminated water supplies and need clean drinking water. Within six months 1,000 women are expected to give birth, but 10 hospitals and health centres have been severely damaged.

Malaysia: Up to 8,000 people, mostly women and children were given temporary shelter in schools in Kota Kuala Muda, Kedah. Deputy Prime Minister Najib Razak said late Tuesday that all tsunami victims in relief centres could return home, but transit homes need to be built for those whose homes were destroyed.

Myanmar: Conditions in the country are hard to assess, but the World Food Programme says up to 30,000 people are in immediate need of food, water and shelter. More than 200 fishing villages face a loss of livelihood.

Somalia: The UN says about 54,000 people have been affected and some 1,000 houses damaged or destroyed.

Sri Lanka: Up to one million people have been displaced according to the government, with nearly 100,000 homes destroyed. Jan Egeland, the UN's emergency relief coordinator, said 780,000 were lodged in some 800 camps in the country.

Thailand: More than 20,000 Thai families from villages along the coast in six affected coastal provinces were affected.