QUICK FACTS Location: Deschutes, Jefferson and western Crook counties End date: Monday evening, Aug. 25 Smoke source: Flat Fire ** Información en español** The Oregon Department of Environmental Quality issued an air quality advisory Friday, Aug. 22, due to smoke from the Flat Fire in Jefferson County . The following areas are affected: Deschutes County Jefferson County western Crook County DEQ expect the air quality advisory to last until at least Monday evening, Aug. 25. Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog , DEQ’s Air Quality Index , or by downloading the free OregonAIR app on your smartphone. Smoke can irritate the eyes and lungs and worsen some medical conditions. People most at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. Protect yourself and your family when smoke levels are high: Stay inside if possible. Keep windows and ...