With the huge amount of rain Auckland has endured over the past week and the forecast for more heavy rain to come (check forecast http://www.metservice.com/towns-cities/auckland ) it is important to make sure your grounds remain stable to protect your home and other properties.
To prevent land movement and slips during sustained wet weather ensure all drains, spouting and downpipes are in working order.
Check to see that Council storm water drains are working properly so that excess run-off does not cause flooding onto your property. Here is a link to information from Council about storm water http://www.aucklandcity.govt.nz/council/services/stormwater/about.asp
In some cases there might be maintenance required to ensure Council storm water drains are working properly.