The Red Cross in Samoa says it's finding it difficult to deliver water to tsunami survivors as the people move further inland.
The death toll from Wednesday's earthquake and tsunami stands at 125.
The Aleipata district is the worst hit area in Samoa, with many having retreated to higher ground, fearing another tsunami.
The Red Cross says it's having difficulty getting water tanks up to the top of the mountain, as people continue moving further and further inland.
It says more water containers are required if water is to get to them.
Food and tarpaulins are also needed and electricity has yet to be restored.