Westland farmers hit by the flash flood that swept through the Grey Valley on Monday have put the clean up on hold as they brace themselves for another deluge.
Metservice has issued a severe weather warning for the South Island on Wednesday and says heavy rain is likely in the north Westland and Buller areas.
Up to 150 millimetres is expected to fall north of Greymouth on Wednesday.
A Grey Valley farmer, Debbie Bland, says heavy rain has been falling since 10am and it is the last thing farmers need so soon after Monday's flood.
"I know someone who's done a flyover and she says there's diggers out everywhere repairing stopbanks, repairing farm tracks, there's blown out bridges," she says.
"Because the West Coast does only have three main roads that it has to go on, you get a blown bridge on one of our main roads, it's a real headache."
Debbie Bland says she's keeping a close eye on her cows, which are grazing near a river bank.
Severe gale force northwesterlies have also been forecast in exposed parts of Wairarapa.