Unison Networks said tonight that widespread outages were being felt across its network regions as the wild weather wreaks havoc on the network.
Unison staff have been working hard to restore power where alternative supply is possible said Relationship Manager, Danny Gough but conditions were too rough to send crews out.
"We're starting to feel the effects now of ex-Cyclone Cook as strong winds and heavy rain take a toll on the network, but things could get worse.
"In weather like this, it is imperative we make sure it is safe for our team to carry out repairs. So, we ask for our customers' patience."
Unison has extra crews on stand-by to start repairs when it's safe to do so, but is also urging customers to ensure they are prepared for potentially long periods without power.
"We are also mindful of our customers who are medically dependant on power, so we urge them to make alternative arrangements and liaise with their medical providers for advice," Mr Gough said.