Grant Robertson: Finance Minister on the economic impact of the Auckland floods - Heather du Plessis-Allan Drive

Auckland is being warned to prepare for more extreme rain tomorrow following Friday's record-breaking downpour.

Many companies are asking office staff to work from home and other businesses will be closing their doors until further notice.

This economic disruption combined with the infrastructure, property, and inventory damage means flooding will potentially cost Auckland businesses hundreds of millions.

Finance Minister Grant Robertson says it's too early to judge the overall impact of the flooding, but the weather damage will result in significant losses.

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