Motorists are urged to take care in the wet weather after a slip south of the Brynderwyns, as State Highway One has now been closed in both directions.
Diversions have been put in place due to the hazardous conditions, police confirmed.
Vehicles travelling south are being diverted at the intersection of State Highway 1 and the Braigh and northbound traffic is being diverted at the Kaiwaka-Mangawhai turn-off.
Northbound traffic was initially diverted onto State Highway 12, but this has now been closed due to flooding.
“This diversion route is not suitable for heavy motor vehicles, who are advised to expect lengthy delays,” a police spokesperson said.