The wild winter weather will continue to bite with parts of the South Island expected to get heavy rain and strong winds on Tuesday.
NIWA is warning a moisture plume from the tropics will bring more heavy rain over the next 24-36 hours.
"The focus will shift into the eastern South Island on Tuesday, where flooding is possible," NIWA warned.
"Twelve places have had a record or near record wet July - a number that will rise."
MetService has issued a heavy rain warning for Ashburton, Timaru, Oamaru, Dunedin and surrounding areas - with 24mm falling in Christchurch since midnight.
The same front which caused chaos in Northland on Monday saw farms flooded, closing roads and forcing schools to shut.
Emergency Management advised people to look out for slips and surface flooding because the ground is already saturated.
A heavy rain watch is in place for Marlborough and Canterbury from the Rakaia River northwards, where a period of heavy rainfall may approach warning criteria while a strong wind watch is in place for Buller.
Meanwhile, residents on the Coromandel Peninsula are feeling the effects of the wild weather, with the main road closed in several places due to slips.
State Highway 25 is shut between Waihi and Whiritoa due to slips, while further north near Whitianga, it's closed due to flooding.
State Highway 25A, the Kopu-Hikuai Road, is shut off due to multiple slips.
These closures mean residents on the east coast of the Coromandel Peninsula are completely cut off.
Waka Kotahi is expected to update the status of the roads throughout the morning.
Slips are also affecting motorists in the Rotorua area.
Police are advising drivers a slip is blocking State Highway 33 between Rotorua and Paengaroa.
The slip is between Allport Road and Maniatutu Road with police warning the road is likely to be closed all day.
Detours are State Highway 2, State Highway 29A, and State Highway 36, police said.
MetService has issued a heavy rain warning for Auckland from Whangaparaoa northwards, including Great Barrier Island, Coromandel Peninsula, Bay of Plenty and Mount Taranaki.
MetService warns these areas could see heavy rain, which could cause streams and rivers to rise rapidly, surface flooding and slips, while driving conditions may be hazardous.
A strong wind warning is in place for Auckland including Great Barrier Island, with MetService warning gusts could damage trees, powerlines and unsecured structures. Driving may be hazardous, especially for high-sided vehicles and motorcycles.
