This photograph shows 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)

This photograph shows 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)

This photograph shows 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)

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

This photograph shows vintage champagne bottles dating from the founding of the Bollinger champagne house (1829) 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 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)