Power cuts have been reported in the Lower Kaimai and Tauriko areas this morning, with 534 properties being affected.
The properties have been without power since 8.53am.
Powerco network operations manager Phil Marsh says contractors are currently scoping the network in the area to establish the cause.
"Power is being restored as each section of line in the outage area is declared safe."
Phil apologises for the inconvenience and says all efforts are being made to restore supply as quickly as possible.