About 100 tourists have spent the night at Blue Duck Station near Taumarunui, after slips left them stranded.

Around 120 people were trapped yesterday afternoon, but 14 have since been airlifted out.

Ruapehu Emergency Management Officer Nick Watson says supplies were brought in for the travellers via helicopter.

He says the station has been in contact overnight, and an assessment would be made later today on when to rescue the remaining travellers.

Yesterday, helicopters delivered an electricity generator to the station.

Road crews and the owners of the station's accommodation lodges had tried to clear the slip.

Fire and Emergency says they received no weather related call outs overnight.

Residents around Gisborne have been warned the heavy rainfall was heading their way.

And flood barriers were set up in Whanganui last night but river levels have started to drop.

MetService forecaster, William Nepe, told Morning Report weather warnings still applied in several places.

There was a low sitting to the east of Gisborne and that was expected to drift away, while rain eased.

"The warning currently from Gisborne southwards, including the Wairoa District of Hawke's Bay...can expect in the area of 15 to 25 millimetres of rain an hour," he said.

Mr Nepe says thunderstorms were expected to hit the Wairoa district and coastal areas south of Tolaga Bay.

Meanwhile, part of State Highway 56 in the Horowhenua district has been closed due to flooding.

The stretch of highway in the Opiki area, has been shut off between the intersections of Tane Road and Alve Road.

Motorists are being adivsed to use State Highway 57 instead.

Heavy rain in #Gisborne this morning with 17.8mm falling from 6-7am. The current heavy rain warning over Gisborne and Wairoa is set to remain until 1pm this afternoon - https://t.co/Sd5C6lrsSL. Take care on the road if you're heading out. ^AC pic.twitter.com/oOggFgh99I

— MetService (@MetService) March 8, 2018