QUICK FACTS Location : Clackamas, Crook, Deschutes, Grant, northern Harney, Jefferson, northern Klamath, northern Lake, northern Malheur counties End date: Through Sunday for western Oregon, until further notice for central and eastern Oregon Smoke source : Fires in Oregon and Idaho The Oregon Department of Environmental Quality extended an air quality advisory Friday due to smoke from fires in Oregon and Idaho. The western part of the state is expected to have smoke through the weekend with air quality improving on Sunday. Smoke is expected to worsen in Central and Eastern Oregon on Sunday and into next week. The following areas are affected: Clackamas County (particularly Mt. Hood area) – through Sunday Crook County Deschutes County Grant County Harney County (northern) Jefferson County Klamath County (northern) Lake County (northern) Malheur County (northern) DEQ also expects intermittent smoke in the following areas until at least Sunday. Douglas County (eastern and central) Jacks