Fire, smoke, heat, drought -- how climate change could spoil your next glass of California Cabernet

A couple of years ago my wife and I visited the Bonny Doon Vineyard near Santa Cruz to sample the offerings of winemaking savant Randall Grahm. While we were there, Grahm told us something I haven't been able to forget. It wasn't nearly as foggy along Monterey Bay as it used to be, he said, and that was worrisome for winemakers. With each dose of aberrant weather California has had since then, I found myself wondering how California's wineries were faring and whether the noble grape was becoming a marker -- along with sea level rise and deadly wildfires -- of an overcooked planet. A few weeks ago I called Grahm to continue the conversation.