French wine producers are facing their worst hit to volumes in decades after vineyards were hit by damaging frosts in late spring, according to the country's government, reports Sky News.
The agriculture ministry revealed on Tuesday that a 29% reduction in output was expected across the industry this year as the harvest season gets into full swing.
The widespread frosts were said to have been particularly harmful to early-growing grape varieties such as Chardonnay - used in the production of Champagne - and Merlot.
Officials also pointed to an impact from mildew fungus for the broader hit which, they said, would mean only 33.3 million hectolitres being produced this year.
A hectolitre is the equivalent of 100 litres, or around 133 standard wine bottles.
The forecast means the country faces the prospect of its lowest wine volume since at least 1970.