West Coast Tasman MP Chris Auchinvole says earth-moving teams expect to have the Aorere River protected against further damage in the next three days.
A storm in the Golden Bay valley last week forced the river to change course, flooding 20 houses and farms.
Mr Auchinvole spent Tuesday in the area, and says the clean-up is well advanced.
A breach in the river is being repaired with heavy machinery.
Mr Auchinvole says farmers are keen to have moderate rainfall which is forecast for the area, in order to clean the paddocks, which are covered in silt.