Nelson's mayor says some homes have been flooded - but assessments to find out how many cannot begin until daylight.
Hundreds of homes were evacuated yesterday after the Maitai River burst its banks. And another 10 on the Tahunanui hills were evacuated overnight after a slip.
A State of Emergency was declared for the region, and one was also in place across the West Coast.
Nelson Mayor Rachel Reese says the Maitai river rose surprisingly quickly, and today won't be any easier
