There has been one rescue and others have been told to stay put as heavy rain causes flooding in the Coromandel Peninsula.
Police have told people in four cars who couldn't get out of an area of Kauaeranga popular with walkers to return to a Department of Conservation Hut and wait for water to recede.
Earlier, a car stuck in rising floodwaters in the Coromandel town of Pauanui was towed out.
Three children, aged nine, 10 and 11, who were stuck inside the vehicle on Hikuai Settlement Rd are "okay", the fire service says.
Wet and windy weather has been keeping the fire service busy on Sunday, with callouts to several properties across the North Island over reports of flooding.
In Whitianga, crews attended a house where waters had entered the garage.
Meanwhile, firefighters in Auckland were at Massey University student accommodation in Albany, where water was threatening to enter the building. Crews had to dig drains to divert the waters away.
Flooding in basements and garages have prompted callouts in Greenhithe, Blockhouse Bay, Mairangi Bay, Hillsborough, East Tamaki, Pakaranga, Glen Eden and Randwick Park on Sunday afternoon.
Fire crews are also monitoring high creek levels near Candia Rd in Swanson after residents expressed concern.
Locals report the ponds at Wattle Farm Reserve in Wattle Downs are threatening to overflow and flood roads.
In Tauranga, wind ripped off a loose piece of sheet iron from the roof of a United Video store.
The wettest spot in the country is the Coromandel Peninsula, which has had 120mm of rain recorded over the past 24 hours, according to MetService.
Auckland has received between 30mm and 50mm of rain in the past 24 hours.
A weather warning for Auckland has been lifted, but remains for the Bay of Plenty northwest of Tauranga, where high levels of rain are expected into the evening.
MetService has issued a severe weather warning for Gisborne as heavy rain continues, saying slips and surface flooding may hit the area.
A trough is moving slowly southwards over the upper North Island preceded by easterly winds and a band of rain.
The weather is expected to intensify over the Gisborne region on Sunday night and continue through to Tuesday morning, during which time 140mm of rain may accumulate about the hills and ranges of Gisborne
The heaviest falls are expected north of Tologa Bay, with the possibility of rain rates of 15 to 20mm per hour.
Coromandel Peninsula road information:
The heavy rain is expected to continue until Monday morning, bringing another forecasted 100mm of rain on top of what's already fallen on Sunday morning.
Civil Defence is advising people to avoid waterways and if travelling take extreme care as there is debris on roads from lots of minor slips. Travel should be avoided until Monday if possible.
Newshub. / NZN