State Highway One between Taupo and Turangi has been closed due to surface flooding, as severe weather moves up the country.
There has been around 30cm of water on the road for most of the day and it is not expected to drop until the morning.
Earlier, flooding on roads in and around Ohura led to the closure of Maitere and Ohura rural primary schools and left the town isolated.
State Highway 3 near Awakino has reopened after a 60 metre slip closed both lanes earlier today. However motorists are being warned to expect delays.
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In Wanganui, the river has already reached eight metres in Pipiriki, and is expected to continue to rise to 10.5 metres into the evening.
While there were fears low spots in the city could be flooded, Horizons Regional Council said this is no longer likely.
Police Central Communications Sergeant Andy Dow is warning drivers to take care, use dipped headlights and watch following distances.
Residents are also being warned to keep a close eye on local rivers and report any flooding to council as soon as possible.
MetService said the front bringing the heavy downpours will move across the eastern Bay of Plenty tonight, preceded by strong northwesterlies and rain.
A further 30mm of rain is forecast for the eastern Bay of Plenty ranges tonight on top of what has already fallen.
By midnight tonight, the front should move away to the east with rain easing.
To find out the latest weather forecast for your area click here.