Weather: Kiwis film themselves riding across flooded roads after heavy rain hits West Coast

West Coast residents are riding through flooding after heavy rain left roads underwater.

On Monday, rain warnings were issued for western parts of the South Island. MetService said up to 240mm of rain was expected to pour down Westland and south of Otira.

"Surface flooding and slips are also possible and driving conditions may be hazardous," it warned.

The aftermath of this has been shown by Daniel Willoughby, who sent Newshub a video of the flooding in Whataroa.

The small township in southern Westland was left drenched by the heavy rain, with fences, fields and roads submerged by the deluge. Willoughby filmed himself on a quad bike riding across a flooded road above a swollen river.

"Those are my paddocks, all underwater," he says.

"Found some dry ground for the cows. There's a fence there somewhere. Could go for a swim. That's some rain!"

And the West Coast is urged to buckle up with more heavy rain on the way for Thursday.

"Showers for the West Coast of the South Island are heavy at times with thunderstorms and hail," WeatherWatch says.