Can the most popular red wine in the U.S. endure climate change?

Late-summer heat waves are threatening Napa Valley

Bold cabernet sauvignon wines made Napa Valley famous. Now, hotter temperatures are starting to damage the grapes, so some wineries are starting to experiment.

(Image credit: Ryan Kellman)

Bold cabernet sauvignon wines made Napa Valley famous. Now, hotter temperatures are starting to damage the grapes, so some wineries are starting to experiment.