(BCN) -- Crews are at the scene of a 10-acre fire northeast of Calistoga on Tuesday morning, Napa County officials said. The county sent out an alert around 10:30 a.m. about the fire in the area of Old Lawley Toll Road but said there are no evacuations underway or structures threatened. Patelco security incident could take days or weeks to resolve People should expect heavy smoke in the area and can go to readynapacounty.org for more emergency information. The fire is wind-driven, mid-slope pushing down valley with short range spotting, according to Cal Fire. Bay City News contributed to this report.