Dunedin remains in a state of emergency after seeing it's wettest day in over a century - with twice the usual October rainfall falling in just 40 hours.

The red warning for North Otago, Dunedin and Coastal Clutha is in place until 11pm tonight.

More than 80 people were evacuated from their homes overnight and nearly 40 roads are currently closed.

Emergency Management Minister Mark Mitchell told Jack Tame that he was at Saint Clair’s golf club and witnessed them set up the evacuation centre.

Mitchell says that volunteers have helped turn out stretches and look after families as they came in.

"As Kiwis we always seem to stand up and respond strongly when there's a need, and that's exactly what is happening," he said.

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