KEVIN STENT / STUFF
Flash flood cleanup in Plimmerton may increase as more heavy rainfall is expected tonight.
A heavy rain warning remains in effect for the wider Wellington region, with a forecast of 50-60mm on Monday evening.
The warning is in effect for Wellington and Kapiti Coast, south of Ōtaki, until 1am, and a strong wind warning is for the same area until 10am on Tuesday.
Fire and Emergencies New Zealand have received 10 calls since 6pm in connection with flooding in Tawa, Plimmerton and areas in the Hutt Valley.
MetService anticipated that heavy rainfall could cause streams and rivers to rise rapidly, and floods and surface slips are possible, potentially making driving conditions dangerous.
* 15 houses probably uninhabitable after heavy rains, flooding north of Wellington
* Severe storms can cause twice as much rain as summer in just two days
* A stable new neighborhood for Wellington Riding for the Disabled
Between 7pm and 9pm on Monday, MetService data showed Wainuiomata had 27.6mm of rain, Lower Hutt, 20.2mm, Upper Hutt, 19.2mm, Wellington central, 15.4mm, and Porirua, 7.2mm .
The New Zealand Transportation Bureau is asking drivers to slow down and increase following distances due to flooding on the State Highway 1 at Ngauranga Gorge, SH1 from Plimmerton to Pukerua Bay and SH2 from Petone to Haywards Interchange.
Southbound SH1 Johnsonville was previously closed due to flooding, but has since reopened.
A pedestrian was taken to hospital in moderate condition after being involved in a motorcycle accident on The Terrace, between Bolton St and Aurora Tce, which has since reopened after being temporarily closed.
Has there been a flood in your area? Send your photos and video to [email protected]
Greater Wellington Regional Council said Sunday’s flash flood in Plimmerton was a one in ten year flood.
It recorded 51mm of rain at Whenua Tapu Cemetery in Plimmerton, the third highest total of three hours since 1991.
At Battle Hill Farm Park, rainfall of 59mm was recorded for a total of three hours.
“Rain was very intense there during periods, dropping 20mm in just 20 minutes,” said a GWRC spokesman.
Farther north, at Te Horo and Ōtaki, 50mm-60mm of rain was recorded for six hours, which also caused some flooding, estimated to be one event in seven years.
The Kapiti-Mana Red Cross disaster response team was activated this afternoon in Plimmerton and is providing local support to residents in affected areas.
Porirua City Council said 20 truckloads of mud were cleared Monday, in preparation for further rain in the evening.
A council spokeswoman said 15 houses were deemed uninhabitable and that it is helping two families with emergency shelters. Others have made their own arrangements.
Wellington Water, Downer and Fire and Emergency crews remain on standby in the Plimmerton area.
Mark Owen, NZTA’s regional transportation systems manager, said there is a renewed risk of water build-up around the Plimmerton roundabout and on State Highway 2 around Petone.
The flood in Porirua is expected on Monday at 11 p.m.