Milk and bread as well as other essentials have been cleared out of Takaka as the Tasman town is cut off and trucks with supplies are unable to reach them for days.
Several shops have noted they are out of the popular goods as people rushed to stock up on supplies as Cyclone Gita severed the town from Nelson as landslips closed SH60.
Milk, bread, canned goods and toilet paper was the first to go as people rushed to the supermarket to stock up on items, Fresh Choice manager Roger Pait said.
"The shop was chocker you couldn't even move around."
It would remain closed for several days at least, and repairs could take some time, Nelson Tasman Emergency Management Group said.
An update on the situation will be provided by NZTA on Thursday morning.
"Nelson Tasman Civil Defence has arranged for a delivery of food and essential supplies by barge to Port Tarakohe in Golden Bay, which will arrive late tonight or early tomorrow morning.
"Work is also happening to ensure a regular supply continues by sea as long as required."
A limited fuel supply in Golden Bay was being managed with a $30 worth of fuel per vehicle per day restriction in place, Civil Defence said.
"Arrangements have been made so that emergency services and their volunteers, contractors working on the recovery, medical staff and other key personnel have adequate access to fuel."
Despite the road "running like a river", the Takaka Volunteer Fire brigade managed to rescue tourists stranded by rising waters to safety from the Takaka Valley.
"It has been one hell of a storm," volunteer firefighter and Upper Takaka farmer Nigel Harwood said.
The Nelson and Tasman districts were among seven around the country that declared a state of emergency yesterday as former Cyclone Gita battered the country with heavy rain, high seas and strong winds.
About 5.30pm yesterday the brigade was called about a couple whose car had been flooded in the Takaka Valley.
The couple, driving a people-mover, had tried to drive through the torrent but flooded the engine.
"They had been towed by somebody else to higher ground, but by the time we got there the water had risen even further and was starting to surround them.