Nearly 300 firefighters are continuing to battle a fast-moving wildfire in Napa County, California, on Wednesday (July 22).br br According to local reports, the fire, which has already burned 1,000 acres, was sparked by a vehicle crash on a nearby highway.br br Officials are urging visitors and hikers of a nearby popular hiking and campground area to stay away.br br At least three hikers had to be rescued from a Cold Canyon, just south of Lake Berryessa.br br California is suffering its fourth year of a devastating drought.