About 20% of Australian wine exports are affected by heat damage, according to one of the industry's leaders. Philip Ladder, Orlando Wyndham's chief winemaker and director of winemaking told a technical conference the damage did not make the wine undrinkable but did cause it to lose appeal to overseas consumers.

"We all specify we want our containers under deck and away from boilers and bunker oil with no transhipping. But the shortage of shipping meant there was no guarantee about where containers were placed and frequent transhipping meant containers were often left on docks in Singapore for several days," Laffer said.