SEBASTOPOL, Calif. — The lush vineyards that dot the hillsides and valleys here largely survived the fires that leveled neighborhood after neighborhood to the east.

Crushed cabernet sauvignon, merlot and other grapes in tanks are now fermenting into wines that have earned California a prestigious place among global producers.

But the wine industry and the lodging, restaurant and construction sectors that help make this bucolic region a draw for millions of visitors each year are now bracing for a different crisis: the potential loss of many members of their immigrant work force.

Some 5,700 houses and structures have been destroyed and many more damaged by the blazes that barreled through Northern California last week. About 100,000 people were displaced, temporarily or permanently.