Assistant Division Forest Fire Warden John Rieth says approximately 40 firefighters are on the scene Tuesday.
Rieth says there's no word yet on the cause.
The blaze broke out early Monday in Tabernacle and Woodland, and by midmorning it had extended across 600 acres. Roughly half of the fire had been contained by early Monday night, but state officials expect it will consume about 1,000 acres before it's finished.
Fire crews expect the wildfire will be completely under control by week's end at the latest.
