There are orange heavy rain warnings for Westland and the Grey and Buller Districts today.
On top of what has already fallen, up to 350mm of rain are expected for the Westland ranges with up to 130mm of rain forecast nearer to the coast.
The MetService is warning that streams and rivers may rise rapidly and there could be surface flooding, slips and difficult driving conditions.
Joining us now with the latest is RNZ reporter Adam Burns.