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However, the flood ripped through fences and gates but caused little direct damage to the crop, although much of the area was under water.
A day later two blocks of vineyard were still under water, and the worry was that grapes could burst from absorbing the excessive moisture in the ground.
Hawke's Bay Winegrowers Association deputy chairman Xan Harding said although there was wet weather elsewhere, including localised hail, the storm had been concentrated mainly in the Esk Valley.
For many harvesting had been brought forward 10-14 days, wind had dried the plains, fruit was ripe and the industry was confident about the season.
"Everyone's getting on with the business," he said. "It is looking real good."