State Highway Two south of Wairoa has reopened - but is down to one lane - as work continues to clear a slip where a person was killed and another seriously injured in a crash on Sunday.

Dozens of roads in and around the Wairoa and Tai Rāwhiti regions have been affected as the region mops up yet again after another bout of heavy rain.

Waka Kotahi acting regional manager of maintenance and operations Mark Owens spoke to Charlotte Cook.