Air quality in the Eugene-Springfield area, central Douglas County and Oakridge is now considered "unhealthy for sensitive groups."
On Wednesday, Salem and Portland had the same designation.
The rest of Oregon remains “good,” even as smoke from wildfires burning in California moved into the state.
The Statesman Journal reports that Multnomah and Washington counties issued voluntary burn restrictions asking people not to use fireplaces and woodstoves if possible.
Jon Bank, a meteorologist with the National Weather Service says winds are expected to shift back toward the south today.