Auckland residents have begun the task of cleaning up drenched homes and filing insurance claims after a massive storm saturated the region on Sunday.
More than 320 properties were flooded, 225 of which were in West Auckland, with some inundated by waist-deep water.
Heavy rainfall between 10am and 1pm caused flash flooding around Auckland with New Lynn the worst affected.
The downpour cut power to nearly 3000 homes. Civil Defence issued a warning to stay out of floodwaters which could be contaminated by sewage.
MetService meteorologist April Clark said around 80mm fell in Auckland over a 24 hour period but the effects were exacerbated because up to 50mm fell in a single hour across West Auckland.
"How the rain pools in different areas can affect things a lot. In that area they got large amounts for at least one hour."
Suburbs affected by flooding included: Kaukapakapa, Devonport, Parnell, Remuera, Eden Terrace, Blockhouse Bay, Morningside, Massey, Westgate, Whenuapai, New Lynn, Avondale, Titirangi, Henderson, Te Atatu, West Harbour, Glendene and Glen Eden