TOPEKA, Kan.  -  Air quality advisories remain in effect for Kansas metropolitan areas as a heat wave continues to grip the region.  The Kansas Department of Health and Environment says a combination of extreme heat, low wind and clear skies is raising ozone levels in urban areas. The advisories cover Kansas City, Topeka and Wichita.
     Elevated ozone levels are of particular concern for children, the elderly and people with chronic lung illnesses.  Meanwhile, Gov. Sam Brownback is touring northwestern Kansas to view the damage from prolonged heat and drought.  Brownback visited central and southeastern Kansas last week.
     The U.S. Drought Monitor showed 64 percent of Kansas experiencing extreme drought as of last week.