The Klickitat County Department of Public Health is advising that air quality in smoke impacted regions of the area may be unhealthy for sensitive groups.  Air quality is generally at its poorest in the mornings and evenings.  The Department notes smoke advisories provide generalized regional information only, and air quality conditions may change rapidly and vary greatly throughout the Mid-Columbia.  More people than average may have breathing problems or have worsened symptoms of existing asthma or lung disease.  Sensitive groups include people with heart or lung disease, asthma, diabetes, infants, children, adults older than 65, pregnant women, or who have had a stroke.  They should limit time spent outdoors.  Excessive heat may also make these conditions worse.  For specific medical advice please contact your physician.