Homes on the edge of a collapsing Auckland waterfront cliff face may be evacuated as a second major landslide carves off property into the sea.

Homes are flooded across the upper North Island as weather continues to lash the country for a second day with floodwaters closing roads and homes under water across the North Island.

Two regions are under a state of civil emergency and many schools across the North Island are closed for the day as insane amounts of rain keeps falling.

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Whanganui and Rangitikei districts remain in a state of civil emergency are more than 500 people are preparing to evacuate as rivers threaten to rise to damaging levels.

After a busy night with torrential downpours causing widespread flooding and slips, the Fire Service is today working at numerous homes across the Bay of Plenty, Coromandel, Waikato and Auckland.

Now a section of North Shore cliff face in the East Coast Bays suburb of Waiake has collapsed, as part of the cliff and trees at the rear of three properties slips into the sea.

One home is just 10m from the edge of the cliff.

Properties on the cliffs between Waiake Beach and Browns Bay. Photo / Jason Oxenham
Properties on the cliffs between Waiake Beach and Browns Bay. Photo / Jason Oxenham

The Fire Service says the slip is still slipping and dangeorus to those below.

It has taken lower gardens, fences and trees into the sea.

Expert geotechnical advice is being sought to see if homeowners need to evacuate.

Today's slip follows a cliff collapse last night, which sent torrents of mud through an apartment building in Kohimarama.

Properties at risk from slips on the cliffs between Waiake Beach and Browns Bay. Photo / Jason Oxenham
Properties at risk from slips on the cliffs between Waiake Beach and Browns Bay. Photo / Jason Oxenham

Auckland Civil Defence has cordoned off the beach between Browns Bay and Waiake to investigate the Sharon Rd slips.

People are being urged to stay away.

In Okahu Bay on Auckland's waterfront a Maori cemetery is under water leaving relatives of those buried distraught.

Meanwhile, heavy rain is forecast across the island today.