It's feared climate change will tip vulnerable native species over the edge.
NIWA's released a report outlining the impact global warming is predicted to have on Auckland over the next 100 years.
By the end of the century it's expected there will be 70 extra days above 25degC per year, four times the current level. Drought and more extreme bursts of rainfall are also predicted, as are rising sea levels, which would have major impacts on coastal communities, infrastructure and habitats.
Forest and Bird climate advocate Adelia Hallett says the effects are already being felt.
"We're already seeing a bit of acidification there. The shellfish are smaller. The waters are already warming and becoming acidic. We see diseases like kauri dieback and myrtle rust increasing their range."
The report warns Auckland will be hotter, the weather will be more extreme, and the sea will rise by at-least 30 centimetres.
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Minister for Climate Change James Shaw promises the new Government will assist local authorities with the transition.
"One of my criticisms of the last Government was they really left local government out on their own, when local government didn't really actually have the resources to do this kind of research and plan for it in advance."
Hotter days bring fire risk
Kiwis are being warned to take action now and keep their properties safe from fire this summer.
Firefighters are expecting this year to be drier than previous years - meaning it is only going to get hotter and drier.
"Plentiful winter and spring rainfall has increased grass and vegetation growth. With the tap now seemingly turned off, these fuels are drying out and will ignite easily," says Fire and Emergency New Zealand's John Rasmussen.
People are being urged to clear vegetation around their home, and when conditions are dry that they mow their lawns in the morning when it's coolest, to prevent the risk of sparks igniting and starting a fire.
Climate change brings a range of impacts for fire weather and behaviour - but more simply, the wet will be wet and the dry, drier, Mr Rasmussen said.
NZN / Newshub.