Hawke's Bay electricty lines company Unison says 60,000 of its customers were without power during Saturday's region-wide blackout.

At 5.45pm this afternoon, Unison said it had restored electricity to the majority of the customers who lost power during the region-wide Transpower fault on its Hawke’s Bay network. Thousands of households from Hastings to Gisborne were without power for more than two hours when the region-wide outage occurred at 10am.

However the company said there would be a planned outage in Flaxmere around 8pm tonight, to resolve an earlier fault.

"Power will be out for around an hour while this is completed. As a general update, most of our Flaxmere customers have been restored, with about 100 still without power," it said in a Facebook post.

Unison said conditions remained "challenging" heading into Saturday evening, and the safety of its field crews remained "paramount".

Faultmen would continue to patrol for damage to the network, isolate where possible and ensure safety during the night, the company said.

"At its peak we had nearly 60,000 customers without power, and the community response to this has been fantastic," said Unison Relationship Manager, Danny Gough.

"The messages of support flowing in via social media have been overwhelming, and very well received by those in the field. We really appreciate customers’ patience.

"With these wild conditions set to continue and snow impacting Transpower’s network, customers should prepare for further widespread outages continuing over the weekend."

If outages occur through the middle of the night, he advised customers call 0800 2 UNISON in the first instance.

"Social media updates will resume in tandem with our crews at first light."

Customers can refer to Unison’s website for advice on getting through power outages and electrical safety: http://www.unison.co.nz/tell-me-about/safety

Timber by EMSIEN-3 LTD