Nine thousand Auckland homes are still without power after Tuesday's huge storm and more bad weather is forecast.
Vector says it's dealing with the worst damage to its network since at least 2007, and it's working around the clock with crews from outside the region also helping.
The restoration of power to some pockets of homes and hot water pilot lines will take well into next week.
Auckland Emergency Management director John Dragicevich says about 7,000 litres of water is being delivered to people without access to it.
"We've arranged for 1,200 1.5 litre bottles of water to be taken to both Piha and Karekare to help the people who have been without it since the storm hit," he says.
Anyone in Piha who is unable to get water by other means can go and pick up bottled water from the Piha Fire Station.
MetService has issued a severe weather and thunderstorm watch across Auckland for Friday night and Saturday.
"We are not expecting the weather conditions to be as impactful over the next day, but we still want our communities to take care," Mr Dragicevich says.
Auckland Council libraries are opening as normal on Saturday and people without power can get warm there and charge their phones.
All Auckland Council leisure centres and YMCAs are offering a hot shower for free.
Further south, a small tornado has ripped through Taranaki.
Emergency services were called to New Plymouth's CBD at about 7pm on Thursday.
Three properties on Gill St suffered minor damage with roofs flying and a window blown out.