(Salem, OR) -- Wildfire smoke is causing air quality advisories in Central and Southern Oregon. The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency issued the advisory through at least Wednesday night. Smoke from the Bedrock Fire between Bend and Eugene, and the Flat Fire in southwest Oregon is causing the problem. It's especially hazardous for infants, young children, people with heart or lung disease, older adults and pregnant people. They should stay indoors and use a HEPA filter to remove smoke from the air.