Stormy weather this week broke record rain levels, caused widespread flooding, slips, blocked roads and tore signs off buildings, damaged powerlines and drowned livestock.

Efforts to clean up debris and damage from the double blast earlier this week have been hampered with a new blast today.

Today, a number of weather-related incidents have been reported, with west Auckland hit the worst. They include:

• 170 homes reportedly flooded in West Auckland, plus more around the city.

Suburbs affected include Kaukapakapa, Devonport, Parnell, Remuera, Eden Terrace, Blockhouse Bay, Morningside, Massey, Westgate, Whenuapai and New Lynn.

• Ten people were rescued in New Lynn from rising floodwaters.

• Police were called to a crash at the intersection of Davies Road and Ararimu Road in Manurewa shortly before 11.30am.

A car was on its roof and power lines down. A police spokeswoman said the crash, involving just the two vehicles, had caused an power outage.

She was unable to confirm, what if any injuries there were.

• Reports of a landslip into a house in West Auckland.

• A massive tree has crashed down over a footpath at the Auckland Domain.

• An inflatable yellow raft was found floating past the Taita rocks on the Hutt Valley river about 11.15am.

Police said they had "major concerns for any people who may have been in the water at the time with the raft".

They are seeking information more information.

Latest weather warning

West Auckland suburbs have been hit the hardest with the Fire Service reporting that more than 50 homes had been flooded within two hours.

Shortly before midday, heavy rain began lashing Auckland City, heralding the start of the period of wild stormy weather. ​A thunderstorm warning expired at 2pm.

Auckland Civil Defence operations manager Aaron Davis warned people to brace themselves for "extreme winds" with the potential to topple trees and power lines.

Great Barrier Island was expected to bear the brunt of the forecast 100-120km/h winds.

"This is a fast-moving and very unstable system with a risk of small tornadoes anywhere across the region.

Davis advised against any non-essential travel, to secure furniture, have a battery-operated radio handy in case of power outages, bring pets inside and consider closing curtains as windows could be broken by trees or debris.

Metservice meteorologist Philippa Murdoch said it was hard to say how today's inclement weather would stack up against the previous days.

"But we are definitely not out of the woods yet," she said. "We still have that really warm air with lots of moisture in it."

Overnight Murdoch said the wet weather had eased off.

"[In] places like Northland there hasn't been any huge numbers in the last 24 hours; in Auckland we've had up to maybe 30mm to 40mm in the last 24 hours, but most of that was [Saturday] morning."

But Murdoch said it wasn't completely over yet.

At 6.30am she said the heaviest bout of rain was lashing parts of Taranaki, Nelson, Wellington and Kapiti, with it expected to move into the central part of the north island, through to Taranaki, Taupo and the Central Plateau.

Police have released a statement urging members of the public to drive carefully as the wet weather lashes the capital.

"Heavy rain across the Wellington region is making driving challenging and motorists are asked to drive to conditions."

Police advised drivers to slow down, increase following distances and take their time.

Events cancelled

While this morning's annual Colour Run in Auckland managed to get underway in a break between storms, it's bad news for St Patrick's Day fans.

A parade scheduled for today, ahead of St Patrick's Day on Friday, has been cancelled.

Parade organisers said due to uncertainty around when exactly the weather would clear there was not enough time to safely set up the event scheduled to take place in Ponsonby this afternoon.

"The health and safety of our parade volunteers and performers is our primary concern.

"We are as disappointed as you are but unfortunately we cannot control the weather."

Organisers have not set up an alternative date for the event.

Clean-up mode

Residents around Northland, Auckland, Coromandel and Waikato regions were in clean-up mode Saturday after the second wild weather event in a week saw motorists stuck in flood water, hundreds without power in Auckland overnight.

In an update this morning Vector spokeswoman Beth Johnson said most Auckland residents should be back on the grid.

"Crews have worked through the night to restore power to all but a few homes. There is one remaining outage: Kawakawa Bay Coast Road."

Johnson said slips in the area were continuing to happen and the ground still needed to be stabilised before crew could get in and fix the outage.

Affected residents were on generators for power supply and had been advised a full repair was still a few days away.

The Kawakawa area was one of the areas worst hit by the bad weather; Kawakawa Bay Kindergarten was almost totally destroyed in the first downpour mid-week after a tidal creek at the back of the building flooded, head teacher Lisa Carlin told the NZ Herald.

The latest downpour further impacted on the massive clean-up job.

More than 500 children's books worth $3000, puzzles, pictures, and CDs have been ruined by the downpours and associated flooding, which has also water-logged furniture, damaged computers and up-ended outdoor equipment.

"We have to relocate the kindergarten and children to the community hall. It's going to take about three months to get it up and running again."

Numerous roads in Northland, Auckland and Coromandel were cut off by the flooding, but road crews have been working hard to get them open.

Crews today were continuing work across the highway network to clear debris.

There were travel warnings in place for a number of roads in the Waikato and Coromandel affected by slips and flooding although none appeared to be closed.

To check road conditions when driving go to the NZTA traffic information site.