A Christchurch politician is calling for action after the seaside suburb of New Brighton flooded again on Wednesday.
Christchurch City Council says an unusually high tide forced the Avon River to breach its banks and rise above sandbags put in place after the February earthquake.
Up to 50cm of water inundated parts of New Brighton Road.
Burwood-Pegasus Community Board chairperson Linda Stewart says the riverbed has risen up to two metres since the September earthquake and fears flooding will be a continuing problem.
Ms Stewart would like local authorities to dredge the Avon immediately to protect homes and businesses.
The council says the flooding is subsiding and it is not expecting more on Wednesday evening.