The upper North Island has been hit by torrential rain, causing flooding, and a school camp with about 180 children is isolated by rising waters.
Camp Adair in the Hunua Ranges saw more than 160mm of rain overnight, and Civil Defence have confirmed the fire service was helping evacuate the school group at the holiday camp.
MetService duty forecaster Heath Gullery told RNZ the area received the heaviest rain overnight.
The heavy rains have caused flooding from South Auckland to the Coromandel.
Roads are closed in Papakura and Clevedon, with at least one house evacuated.
Approximately 15 houses have been affected by flooding in Kawakawa Bay to the south east of Auckland central, while slips on Turei Hill are preventing people getting out.
Civil Defence said some motorists had tried to drive through floodwaters and two vehicles had to be rescued.
Power has been cut to more than 800 homes due to damaged power lines.
In the Coromandel, the flooding has been concentrated around Pauanui and sections of State Highway 25 are closed. There are concerns homes will be evacuated today.
There are heavy rain warnings for the Bay of Plenty, Coromandel, Gisborne and Wakato.
MetService and Civil Defence are warning people to take care on the roads and avoid them completely in southern Coromandel if possible.