About 230 homes in West Auckland are without power after a tree fell on a line in Titirangi about 4pm.

Vector spokeswoman Sandy Hodge said the line is down in Konini Rd and crews are working to isolate the broken line and back-feed the electricity through other lines.

Despite the fact it was just one line, for safety reasons they have to cut power to a larger area.

She didn't know when it would be restored but the Vector website is estimating it to be repaired by 7pm.

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There are also minor other minor outages in Piha, Kumeu, Muriwai, Epsom and Te Atatu.

A map showing where the outages are can be found here.