The storm which battered eastern Otago last month has already cost more than $5 million, but that is set to balloon when insurance figures are released next week.
At least 2000 claims related to the July 21-22 weather event have already been received by insurers and EQC.
The Insurance Council of New Zealand is set to release provisional figures of the damage caused when more than 100mm of rain fell over coastal Otago and South Canterbury.
The severe weather has cost the NZ Transport Agency $2.6million already with the Dunedin City Council shelling out about $1.5million and the Otago Regional Council $700,000.
But those figures will grow with the NZTA already preparing for a further $1.1million in spending.
DCC recovery manager Simon Pickford said the council had spent $1.5million repairing the city's transport network since the downpour.
''It is still too early to say what the total cost of the event may be for the DCC,'' he said.
''Most of the cost will relate to roading, in terms of work such as slip repairs.''
Five dangerous building notices remained in effect while three roads remained closed as a result of damage from the storm.
The council had also received 14 applications to the mayoral relief fund.
Three were yet to be assessed, two were declined while five were fully approved and four partially approved. So far, $18,000 had been paid out from the fund.
''Our focus continues to be on dealing with the effects of the July floods, which are now mainly around slip and road repairs, as quickly as we can,'' Mr Pickford said.
NZTA Coastal Otago maintenance contract manager Nic Rodger said the agency had already approved about $2.6million in emergency works funding to repair damage stemming from the downpour and a further $1.1million was yet to begin.
''There remains a significant amount of flood recovery and repair work to be done,'' Mr Rodger said.
''Infrastructure that remains damaged by flooding includes road shoulders, culverts and bridges, a number of under-slips, and several sections of highway that were washed out and remain in an unsealed state.
''The works being investigated and designed include large scour-damaged areas of State Highway 85 and State Highway 1, several large potential slips on SH8, and culverts across the Coastal Otago state highway network,'' the road maintenance manager said.
Contractors from across Otago and Southland were working together to repair the damage.
It was expected work would be completed by the end of March 2018.
An ORC spokesman said much of the damage caused to the council's infrastructure was within the East Taieri and West Taieri drainage schemes.
An Insurance Council of New Zealand spokeswoman said she could not release figures of the insured cost of the rain effects, but provisional numbers would be released next week.
An EQC spokesman said 149 claims relating to the event had been received so far. People had three months to lodge a claim following the event.
''EQC is still in the early stages of settling these claims with quite a few assessments in progress,'' he said.
''In general, it takes EQC about four months to resolve landslip/storm claims because of the complexity of these types of claims.
''To date, five claims have been settled.''
New Zealand's largest general insurer, IAG, said it had received 1738 claims from the event.
Rural insurance specialist FMG said about 120 claims related to the storm with about 30 requiring an assessor to visit the property.
''We're continuing to work through all claims, which have ranged from several badly damaged homes, through to damaged dairy sheds, pump sheds, farm fences, a number of vehicles, sodden hay bales, farm contents and a beehive,'' FMG chief operations officer Conrad Wilkshire said.
Commercial insurer AIG said it had received about 15 claims resulting from the rain and flooding at an estimated cost of $400,000.
