Smoke from S. Oregon wildfires follows the Cascades north

Smoke from the Oregon wildfires swept across the Willamette Valley Sunday, covering the Cascades and the foothills in a haze.

The smoke form the wildfires near the Oregon/California border is drifting north because of slightly cooler and more stable conditions in the region, the National Weather Service said. | Interactive Map of Wildfires

Weather service officials expect the smoke to die down overnight, but say it could return on Monday.

The Lane Regional Air Protection Agency reports that the air quality in Eugene/Springfield is still in a safe range.

The weather pattern also brings on gusts and erratic winds as high as 50 miles-per-hour to Southern Oregon, which could fuel existing fires.

The weather service issued a red flag warning for Monday into Tuesday as more lightning storms are slated for the southern part of the state. Officials said significant lightning could also slow firefighting efforts across the region.