* WHAT. Hot conditions during the day for the valleys. Highs 95 to 105. Overnight lows mainly in the upper 50s and 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. Until 10 PM PDT Thursday. * IMPACTS. Heat will increase the risk of heat-related illnesses, especially those without effective cooling or adequate hydration.

* WHAT. Hot conditions. Afternoon high temperatures of 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to mid-70s. This will pose a moderate to locally major risk of heat-related illness. * WHERE. Eastern Columbia River Gorge of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, and Foothills of the Blue Mountains of Washington. * WHEN. Until 10 PM PDT Wednesday. * IMPACTS. Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

* WHAT. Hot conditions. Afternoon high temperatures of 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to lower 70s. This will pose a moderate to major risk of heat-related illness. * WHERE. Lower Columbia Basin of Oregon and Washington. * WHEN. Until 10 PM PDT Thursday. * IMPACTS. Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration.

Oregon Department of Environmental Quality has issued an Air Quality Advisory. IN EFFECT UNTIL NOON PDT WEDNESDAY. A Smoke Air Quality Advisory has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. Pollutants in smoke can cause burning eyes. runny nose. aggravate heart and lung diseases. and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. For additional information. please visit the Web site at http://www.oregon.gov/DEQ