Footage supplied to the Bay of Plenty Times by Oceania Helicopters showed the extent of the flooding on farmland east of Pāpāmoa on Wednesday.
In an update on Wednesday afternoon, the agency said there were also areas of flooding on SH2 Waioweka Gorge between Ōpōtiki and Waioweka and road users were advised to drive with caution.
The recent wet weather had also destabilised four trees along Takitimu Drive, on SH2 in Tauranga, that posed a risk of falling on to the highway if not removed.
There will be a left lane closure with a 30km/h temporary speed limit in place for felling on Thursday night.