Before-and-after photos show how California's wineries have been devastated by fires

Northern California wine country is threatened as a series of massive wildfires continue to rage in the counties of Napa, Sonoma, and elsewhere.

More than a dozen fires ignited on Sunday and grew as strong, dry winds spread the flames over fields and freeways. The eight-county blaze destroyed at least 2,000 homes, businesses, and other structures, and sent residents fleeing for their lives. Thirteen people are dead.

A majority of the area's thousands of wineries have been spared. But winemakers won't know the extent of the damage until evacuation orders are lifted and they can return to their estates.

Here's what we know about the state of damaged wineries.