An aid agency in Indonesia says a storm is stopping tsunami relief from reaching villagers who have fled into the hills.
More than 400 people were killed and 270 were seriously injured by a tsunami after a magnitude-7.7 earthquake at 9.42pm last Monday.
About 160 people are still missing.
Surf Aid chief executive Andrew Judge says fear of the ocean has driven people away from the coast, making it harder for aid to reach them.
Mr Judge says people hiding in the hills have no food, shelter or fresh water.
He says there are no roads to reach hardest-hit areas and the only way there is by boat.