A person walks down stairs past oak barrels in the wine cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

A man works in the wine-making cellar during the grape harvest at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

A worker takes a sample of juice to measure the sugar content of the grapes in the wine press during the grape harvest at the Bollinger Champagne House's vineyard in Mareuil-sur-Ay, northeastern France, on August 18, 2026. Due to the rise of temperatures linked to human induced climate change and a scorching hot year for 2026, the grape harvest starts early this year. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows a "Champagne Bollinger" logo at the Bollinger Champagne House's vineyard in Ay, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

Workers load crates of Pinot Noir grapes onto a trailer during the grape harvest in the vineyards at the Bollinger Champagne House's vineyard in Avenay-Val-d'Or, northeastern France, on August 18, 2026. Due to the rise of temperatures linked to human induced climate change and a scorching hot year for 2026, the grape harvest starts early this year. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

A worker carries crates of Pinot Noir in the vineyards at the Bollinger Champagne House's vineyard in Avenay-Val-d'Or, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

This photograph shows a "Route touristique du Champagne" road sign in Tours-sur-Marne, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)

A grape harvester collects grapes of Pinot Noir next to a filled up bucket in the vineyards at the Bollinger Champagne House's vineyard in Avenay-Val-d'Or, northeastern France, on August 18, 2026. (Photo by Jean-Christophe VERHAEGEN / AFP via Getty Images)