From Bordeaux to the Napa Valley, vineyards are in trouble. Bordeaux’s quarter million acres of vines face “a slow but simmering” climate crisis, according to Wine Enthusiast magazine. Increased temperatures, more frequent damaging storms and more can have a big impact on the sensitive grape, increasing the alcohol content in some varieties by 10% or more. In California’s Napa Valley, frequent wildfires have scalded multi-million-dollar vintages. Other vintners who thought they were spared by the flames were felled by the smoke, which either ruined the taste of America’s priciest wines, or blackened the grapes to make the costliest raisins in history. Insurers have also turned the screws on California wineries, either jacking up premiums, limiting coverage, or cancelling policies outright.