Parts of Auckland, Wellington & the Hutt Valley are currently without power, apparently due to some kind of fault at the Huntly power station.
Porirua is unaffected so far, though I make no garrantees that will continue!
EDIT: Doh! My bad. While the CBD has had no interruptions, it looks like most of the rest of Porirua has no power! We now have reports of outages in Aotea, Ascot Park, Waitangirua, Cannons Creek & Whitby.
Does your business rely on having a power supply to remain open?
Or have you got a back up plan?
A generator maybe, or gas for cooking if that's what your business involves - cafes in Wellington that cook with gas do a roaring trade during power cuts, as the office workers leave their buildings when they have no way to work without power.
Things you can do that don't require power - paper-based systems etc, or good batteries on a laptop. Some way to process eftpos & credit card transactions that doesn't rely on being plugged into the mains.
All things that you may want to think about for keeping your business going - especially at such a busy time of year.