Wairoa is also under the heavy rain warning - which lasts until mid-Saturday.
Residents are cleaning up Cyclone Gabrielle's devastating effects.
But infrastructure, such as the roads in and out of the district, are vulnerable - and more heavy rain will likely take a toll.
The prime minister Chris Hipkins was due to head to Wairoa on Thursday afternoon*, to meet with volunteers and the district's mayor Craig Little.
Mr Little told Māni Dunlop the town needed more support, and millions-of-dollars more money to get people back on their feet.
*Post-show update: the prime minister's flight turned back to Napier due to the poor weather conditions.
