Two Indian naval ships with supplies arrived over the weekend with a third expected to arrive during the week.
The United Nations said it would donate water containers, water purification tablets and tarpaulins while the World Health Organization will support medical teams in affected areas.
China issuing a statement has already pledged USD 2.2 million dollars in aid.
Pakistan and several other countries had also offered help.
The flooding is the worst since May 2003, when 250 people were killed and 10,000 homes destroyed after a similarly powerful monsoon.
All schools in flood-hit areas, including the capital Colombo, will be closed for a week.buy augmentin online buy augmentin online no prescription
The meteorological department said it is forecasting more rain in the next two days.