Severe congestion is likely to occur throughout Monday.
Here is what we know.
The driver took to Reddit to try get to the bottom of the mystery.
Police said there are concerns for his welfare and they are urging anyone with information to get in touch.
Port of Tauranga said three workers have reported feeling sick from the smell.
Police said it's unclear what the person was doing in the water.
Several roads are closed while police respond to the incident.
"It was completely wrong of us to act in a way that perpetuates racism and reinforces harmful stereotypes," said the team apology.
Organisers say they considered asking the group to leave, but no one had voiced concerns at the time.