Ex-Cyclone Gita's effects are still being felt.

At the top of the South Island, Golden Bay residents are still cut off thanks to a slip on Takaka Hill Road.

It'll take a few more days before the roughly 19 slips  can be cleared and the road can be open again for fuel and food supplies to be delivered to residents in Golden Bay.

Fuel restrictions remain in place with cars only able to fill up a maximum of $30 dollars per day.

Some food was delivered today by barge, and Civil Defence Minister Kris Faafoi says there's no panic about any shortages.

"I don't think they are overly concerned about the supplies at the moment, so I think if we can fuel in via the barge I think things will be fine and the restriction that is in place at the moment can be taken away."

Meanwhile, New Plymouth residents are flocking to water stations as tap water dries up.

The District Council says repairs are continuing on a massively damaged bridge which carried one of the city's main water pipes.

The welding of the sections was almost finished and work would continue through the night to get the pipe reconnected as soon as possible.

The disruption led to a boil-water notice for all properties in New Plymouth, Bell Block, Waitara, Tikorangi, Lepperton, Onaero and Urenui.

It has seen water stations set up, with the busiest outside the Waitara Memorial Hall, where more than 600 people have visited since 6am.

Taranaki reporter Abe Leach visited the scene and reports that multiple people are using the stations.

"It's not just filling up bottle, they're filling up buckets, plastic containers, outdoor shower bags. One elderly couple I saw was filling up a pot which they said they would use for cooking later on."

Power customers in the area who have had their supply cut by Cyclone Gita face the possibility of another night without electricity.

At the height of the storm, about 26,000 Powerco customers had their power disrupted.

Network operations manager Phil Marsh says 5200 properties were still off the network on Thursday, 4900 of them in Taranaki.

"The field crews are working really hard but we understand the frustration of people who have been without power for close to two days now," he said.

However, the extent of the damage meant some customers might not get their power restored by the end of the day.

Extra crews had been brought in from throughout the North Island to help but there were some areas, particularly eastern Taranaki, where Gita's impact was still being assessed.

Meanwhile, KiwiRail says it is working hard to get freight moving again on the storm-damaged Main North Line between Blenheim and Christchurch.

Cyclone Gita's sting has shut both the rail line and State Highway 1 along the Kaikoura coast.

KiwiRail spokesman Walter Rushbrook says a lot of the areas where work was done after the 2016 Kaikoura earthquake had held up well against "truly exceptional weather".

"However, around 300,000 cubic metres of material has been spread across 60 sites from Parnassus to Clarence," he said.

"This has shut both road and rail."

Rushbrook said KiwiRail was working alongside the NZ Transport Agency to get both routes open again.

However, KiwiRail would not be in a position to run any trains between Blenheim and Christchurch next week.

Rushbrook described the rainfall from Gita as extreme.

In some places, it exceeded 200mm in 18 hours, which NIWA reported as being 28 per cent of the normal annual rainfall for the area.