Dozens of campers fled from the grounds of the Westport Trotting Club as a "mini tsunami" of floodwater flowed into the grounds.
The West Coast of the South Island has been hammered today as the remnants of cyclone Fehi bears down on New Zealand.
The wild weather, king tides and torrential rain were bad news for around 25 campers who had settled down on the grounds of the Westport Trotting Club in preparation for the Buller Gorge Country Music Festival this weekend.
Local Jaydin Shingleton, who was set to perform at the festival over the weekend, helped many of the campers out of their soggy situation.
"I'm six foot and it was up to my knees," he said.
Shingleton said lots of people had already arrived at the venue for the festival, so he quickly got to work trying to help out campers that had been flooded out.
"We've been trying to get campervans out of the water, get campers to a higher spot while we wait for waters to recede.
"We've got people with fishing rods pretending to fish into the knee deep water."
After helping the festival-goers Shingleton moved on to help others who were in a spot of soggy trouble.
"There were a few scared people," he said.
While the original venue was now better suited for kayaking than live music, Shingleton remained optimistic about the fate of the festival.
He said people had been offering up their paddocks as alternative venues and the show would go on.
Meanwhile, multiple horses were rushed out of their stables at the back of the racing track after the flood of water washed into the grounds.
Westport Trotting Club's vice-president Troy Scanlon didn't make it to the grounds in time to help deal with the chaos when the flooding hit.