There have been landslips in the Wellington suburb of Newtown and surface flooding in Hutt Valley and Mana as the torrential rain moves south.
Heavy rain in Wellington caused a small slip at Breaker Bay Photo: Supplied / Wellington City Council
Record amounts of rain over the last two days flooded parts of the Auckland region, Northland and Coromandel.
The deluge has caused flash flooding in homes in Auckland this afternoon.
Follow RNZ's live coverage here.
Wellington City Council staff are dealing with landslips in Newtown after 28mm of rain fell in six hours this morning.
The wild weather has also closed Grays Rd in Plimmerton, and there is surface flooding on Hutt Road between Ngauranga and Petone.
Flooding on Mana Esplanade has cleared but the Transport Agency has asked motorists to take care.
MetService earlier issued a severe weather warning for the region, along with other parts of the central and lower North Island.
It said a trough was crossing central New Zealand today, while a separate low would move south-east across the northern North Island.
Eastern Bay of Plenty could receive another 50mm to 70mm on top of what had already fallen.
Up to 25mm of rain could fall per hour at peak intensity, it said.
"Rainfall in these areas, especially where there the ground is sodden from previous heavy rain, is likely to cause rivers and streams to rise rapidly," Metservice said.
"It can also lead to flash flooding and hazardous driving conditions."
Similar amounts of rain were forecast for the lower North Island and Marlborough, with 60mm to 90mm expected in Taranaki, Horowhenua, Kapiti Coast, Wellington, Nelson and northern Marlborough, from early this morning until mid-afternoon.
More rain was expected tomorrow, with possibly heavy falls in the morning.