Arlington Road in Central Hawke's Bay is underwater, as are many hectares of farmland, with more heavy rain forecast.
Two major highways have been forced to close overnight after heavy rain caused flooding and slips.
State Highway 5 between Napier and Taupō would remain closed overnight until at least Wednesday morning due to multiple slips and surface flooding.
Deteriorating weather conditions also meant State Highway 1 north and southof Kaikoura closed at 5pm for the night. South of the city it was closed between the Leader Rd/SH1 intersection to Peketa and in the north it was closed from Mangamaunu to Clarence.
Inland Route 70 was closed between Mt Lyford and Kaikoura but access was still available to Mt Lyford from Waiau.
Hastings District Council also closed Taihape Road from 5pm due to surface flooding, and would reassess conditions at 9am tomorrow. Eleven roads were forced to be closed by Tuesday afternoon.
NZ Transport Agency journey manager Oliver Postings said crews were working hard to reopen SH5, but challenging conditions and large amounts of slip material spread across the route were making for tough going.
"No official detour is available so any trip between Napier and Taupō would likely involve having to drive to Palmerston North and then back up."
This would add hours on to your journey and, given the deteriorating weather, NZTA was advising road users to delay any unnecessary travel," Postings said.
Meanwhile in Wellington, the Hutt River was beginning to flood due to heavy rain in the region throughout the day.
The Hutt River is rising and likely to start flooding nearby areas - keep a distance and stay out of the water.
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Video: Barbara Jones
Block Road in Lower Hutt and the Riverbank carpark area are now closed as the river overflows onto them.
#FLOODING The Hutt River is reaching warning levels are starting to overflow. If you are parked near the river, move immediately.
Video: Mellissa Warrington
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