Northland officials are keeping a close eye on the forecast as they scramble to clean up after Friday's storm.
The one in 500-year downpour has left roads blocked by slips and left severe flooding near Whangārei.
Mayor Sheryl Mai says the region cannot handle any more rain.
"The soil is waterlogged and it could slump again," Mai told Newshub on Sunday. "We could get more slips and things so we are vulnerable. We're just hoping that the weather will be kind to us."
But Speaking to The AM Show from Whangārei on Monday morning, Newshub reporter Shannon Redstall said more wet weather overnight hadn't helped the clean-up efforts.
Mai suspects it will take a team effort to clean up the region's worst-affected areas.
"My heart goes out to the people still having to face the clean-up but I know everybody's got neighbours who are mucking in, and the general sense of commitment to our community is phenomenal," Mai said.
She said spirits are low after what has been a rough year for the region.
"We've been through a drought, we've been through [the COVID-19] lockdown, and now we've been through an unprecedented rain event storm.
"Some people are still mopping up but everyone knows someone who's been impacted by this."
Redstall said it had continued to drizzle in the region overnight.
"It's not the heavy downpours we have seen over the weekend but at this point, any rain is a nuisance.
"State Highway 1 through the Mangamuka Gorge remains closed today [Monday] because there are eight massive slips along that road."
Residents have been asked by the council to ease up on water usage, Redstall said.
"The continued rain here in Northland isn't helping water treatment plants deal with the deluge of water and the water is simply too dirty to process so residents are being asked to conserve their water usage by 50 percent."
According to the NZ Transport Agency, SH1 through the Mangamuka Gorge is expected to stay closed for several days.
Showers are still a possibility for Whangārei on Monday morning, according to MetService, with expectations they will clear in the afternoon.
Monday's forecast is looking promising for the entire North Island with no severe weather warnings in place.
In the South Island's Westland region, a heavy rain warning is in place with between 130 and 180mm expected between 9am Monday and 6am Tuesday.
Further south, Fiordland can expect similar rain accumulations between 11am Monday and 4am Tuesday with a heavy rain warning also in place for that region.