AUCKLAND, March 13 - All but two schools and one early childhood centre in the North Island have opened following flooding and heavy rains last week.

In the Auckland region, Mercer School is closed due to road closures and Playhouse Early Learning Centre in Green Bay, after fears several more wouldn't open on Monday following flash flooding over the weekend.

Karangahake School in the Coromandel region is also closed after the region was hit with downpours several times last week, the Ministry of Education said.

Morning showers are expected in Auckland before fine spells emerge later on Monday for a top of 23C have been forecast by MetService.

A high will also begin in the South Island on Tuesday, making its way up to the North Island on Wednesday.

Waist deep waters in car parks and backyards and rivers flowing down roads were the images of a very wet Sunday in Auckland.

The Fire Service said it was called to 321 properties in Auckland on Sunday, of which 225 were in west Auckland.

It had responded to 582 emergency calls from 6am on Sunday.

At the peak of the deluge across Auckland, Waikato and into Rotorua the Fire Service was receiving a 111 call every 24 seconds.

Homes were flooded in the Auckland suburbs of Glen Eden, Titirangi, Green Bay and New Lynn.

Ten people were rescued from flooded shops in New Lynn and a Bunnings store was evacuated after its floor was raised 300mm.

Further up the road in Kelston, 12 residents were evacuated from a multi-dwelling residential block.

One of the area's busiest intersections, at Great North Road and Titirangi Roads, was still down to one lane during rush hour on Monday.

Mayor Phil Goff on Monday morning called for an investigation into how to prevent further flooding.

Pictures from Sunday posted on the New Lynn Community Facebook page show one resident walking in water up to his armpits, others breaking out kayaks and lakes appearing where parks used to be.