The NZ Transport Agency says a slip has shut SH6 between Haast and Makaroa.
The Transport Agency’s Journey Manager Lee Wright says contractors are working to clear the road and get it open again.
Heavy rain is continuing fall in the West Coast region.
Motorists are being asked to take care with considerable surface flooding on roads in the region and many rivers still running high.
Next update at 4pm
For the latest information on highway conditions phone 0800 4 highways or go to www highwayinfo.govt.nz(external link).