Firefighters with Tualatin Valley Fire and Rescue extinguished a fire along Highway 99W Monday.
Drivers along the busy highway dialed 911 after witnessing large flames moving toward a home.
Firefighters from King City Station 35 extinguished the fire before the flames could spread to the residence.
Investigators later learned that a property owner near the Tualatin National Wildlife Refuge was burning blackberry bushes on his property near the road when the wind changed, fanning the flames and spreading the fire the a nearby field.
'Even in the winter, the grass is dry enough to burn,' said TVF and R spokesman Brian Barker. 'Combine this unusual dry spell with the wind we're getting today and you have a recipe for fast-moving fires. This is a good reminder to use extreme caution with fire year round.'