Over 200 homes in Matapihi and Merivale are without power.
PowerCo reported power outages at 268 homes in Matapihi and 98 in Merivale.
Properties affected in Matapihi had their power turned off at 9.45am and were expected to have power restored at 12.45pm.
Merivale homes were affected just after 9am and were expected to have power restored at 11.30am.
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A site investigation is underway.