More than 900 homes were left without power on Monday evening after a helium balloon hit power lines in Petone, Lower Hutt, as the wider region tries to mop up after heavy rain and flooding.
A spokesperson at Wellington Electricity reminded people not to release or have the helium balloons near a power line, as it could be dangerous and cause outages.
About 60 homes remain without power but electricity was expected to be restored by 8:30pm.
Porirua has had a "one in 20 year" amount of rainfall on Monday, with other areas across the Wellington Region facing a "one in five year" event, Wellington Region Emergency Management Office regional manager Jeremy Holmes said.
There were reports of flooding across Kāpiti, Hutt City, Featherston, Silverstream, Trentham, Porirua, Waiwhetu, Whitby, Stokes Valley and Naenae.
Meanwhile, a slip was blocking off a community of about 50 homes in Greymouth.
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