A widespread power outage in West Auckland last night may have been caused by a lightning strike, lines company Vector says.
At the height of the outage, some 10,000 houses were without power after the Hepburn Rd substation failed about 7.15pm.
A large number of customers had power restored by 8.30pm, with the remainder brought back on at 11pm.
Adverse weather may have played a part in the outage, with several lightning strikes being reported throughout the Auckland area yesterday, Vector said.
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Vector and Transpower crews were back at the substation this morning to continue repairs.
Vector's Outage App was hit 23,632 times between 8pm and 11pm.