Jamie Mackay: The Country host on the heavy rain pelting through Dunedin - Heather du Plessis-Allan Drive

Dunedin residents are preparing for a deluge of rain.

A red heavy rain warning is in force for North Otago, Dunedin and coastal Clutha today and tomorrow.

Otago Civil Defence says people should only travel tonight if absolutely necessary - to avoid getting caught up in rising rivers or streams.

The Country's Jamie Mackay says people are getting the sandbags ready ahead of the weather changes.

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