Motorists are being warned about slips and surface flooding after heavy rain in Fiordland and Westland.
The Transport Agency says drivers should take care on State Highway 94 from Te Anau to Milford Sound.
It says heavy rain has caused two slips, closing SH6 between Franz Josef and Fox Glacier about 6.50am.
Surface flooding was also affecting many areas along State Highway 6 between Ross and Haast.
MetService said that by 7am, 430mm of rain had fallen in Milford Sound and 220mm at Mt Cook.
Meterologist Stephen Glassey said more was expected on the West Coast today.
"In Fiordland the rain will actually ease to showers this afternoon but in Westland we're expecting the heavy rain to get even heavier.
"We've still got the warning in place for Westland south of Ōtira where we're expecting possibly over 500mm of rain to accumulate about the ranges."
Mr Glassey said up to 30mm of rain was falling every hour overnight in Milford Sound.