Most farmers are worried about their crops as they head into the second straight dry year. Vineyard owners say they may be the lucky ones because, at this point, grapes don’t need a lot water — just warm sunshine. That would change with a prolonged drought. … Kendall Hoxsey-Onysko, owner of the Napa Wine Company, is a fifth-generation Napa Valley grape grower and her family knows all about droughts and their impact on the wine industry. Grapevines can thrive without a lot of water but productivity depends on how long the drought lasts.