Christchurch City Council says it will take up to 10 weeks to clear drains and sumps in flood-hit areas to try to prevent further flooding.
The city was hit by another storm on Tuesday which again flooded the Flockton Basin along with other low-lying areas.
A council spokesperson said on Wednesday staff and contractors have been out cleaning up in the city and Banks Peninsula following the latest rainstorm.
More than 20 roads were still closed on Wednesday or have temporary traffic management
Drivers are being warned to take extra care when driving on Cressy Terrace/Park Terrace, Lyttelton due to slips.
Geotechnical consultants are also continuing to monitor known high risk areas
Some residents want out
Some residents in the Flockton Basin say it makes sense for the city council to pay towards moving them out.
This week's flood is the fourth many have endured this year.
Christchurch mayor Lianne Dalziel is ruling out red-zoning properties, but says a task force will have relocation options on the table in two weeks.
Temporary relocation solutions may include offering people a sum of money for their properties, as well as the installation of pumps, flood barriers, and floodgates in areas prone to flooding.