Piha, just West of Auckland, was hit by flash flooding on Saturday after a burst of intense rain.
The short burst of heavy rain caused the local stream to burst its banks.
About one hundred people evacuated from homes but were allowed home by Sunday afternoon.
A number of people who were walking a bush track off Piha Road called police concerned they were trapped by rising river levels.
The group of approximately 20 included people from various groups walking in the bush banded together to get out safely.
They found a safe route back out of the bush and walked out towards Glen Esk Road.