Heavy rain and a leaky roof have been identified as the likely cause of the fire that destroyed the Opononi Four Square store on Sunday night.
Fire investigator Craig Bain, who spent Sunday night at the scene then returned on Monday to comb through the ruins, said water getting through the roof, which may have been lifted by Sunday's strong winds, may have caused arcing. A brief but torrential burst of rain fell shortly before the fire was noticed.
Store owner Paresh Patel saw smoke wafting from the roof as he was locking up at 7.45pm. He ran next door to the Opononi Hotel to raise the alarm, then could only watch as flames raced through the business he had owned for than a year.
The hotel suffered only minor damage, thanks to a patron who climbed on to the roof with a garden hose to keep the flames at bay until help arrived, a double firewall built after the last big blaze, and the efforts of about 25 firefighters. The historic South Hokianga Community Hall, across a narrow driveway, was undamaged.
A visibly distraught Mr Patel, who moved from Auckland last year with his family, was comforted by relatives and customers on Monday. He said he had already received many offers of help from the community.