US news outlets are reporting the death toll has risen to 10 people and 1,500 homes have been destroyed by the blaze, which began late Sunday night local time.
The towns of Sonoma, Yuba and Napa north of San Francisco have reportedly been among the worst hit.
Photographs show the fires spreading to Silverado and destroying tournament grandstands, which had been full of spectators earlier in the day to watch Brendan Steele claim his third PGA Tour title on the resort’s North Course.
Authorities said 14 fires had swept across an area of 57,000 acres as California’s governor Jerry Brown declared a state of emergency for Sonoma, Yuba and Napa.
Silverado Resort said via Twitter that it had closed in response to the fires and had safely evacuated its staff and guests.
NBC Bay Area news reporter Jodi Hernandez posted several videos & photos on Twitter detailing damage caused to homes neighbouring the PGA Tour venue.
One of many homes destroyed around the Silverado Golf Course in Napa. Devastating unbelievable situation pic.twitter.com/9tC2ML0DgX— Jodi Hernandez (@JodiHernandezTV) October 9, 2017
The first reported human casualty came from a blaze in Mendocino County more than 100 kilometres north of Napa while news outlets have reported two people from Napa County have also died amid the blaze.
Reigning Safeway Open champion Brendan Steele was among PGA Tour players who have offered words of support after news broke of the devastating fires.
Just found out about the fires in Napa.Hoping everyone in the area and @SafewayOpen is safe.Sending positive thoughts for quick containment— Brendan Steele (@Brendan_Steele) October 9, 2017
so sad to land and hear about the fires in napa. it's such a beautiful place. everyone stay safe— Bud Cauley (@BudCauley) October 9, 2017
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