Rain forced the closure of the main highway passing through the small South Island town.
The region has already exceeded its average annual rainfall - and there are more than three months to go.
The river wasn't flooded, but Ardern's photo op was still cancelled.
Members of the public are warned not to approach him.
Drivers were left to sleep in their vehicles on Canterbury's Lewis Pass.
A man's body was discovered at the Waimakariri River bed on Monday night.
The controversial sculpture depicts Environment Minister Nick Smith squatting over a glass of water.
Numerous unresolved quake insurance claims are still outstanding.
The artist plans to put it outside the offices of Environment Canterbury.
The killed sheep were five of the last 35 remaining members of the Campbell Island breed.
The workers are gathering to protest poverty, inequality, homelessness and underfunding.
The country's first 'smart playground' is causing some controversy.
The finale is a big deal for many, including the police.
The fund will "get things moving on Canterbury's terms, not Wellington's terms."
A Canterbury councillor has released a Taylor Swift inspired music video.