* WHAT. Dangerously hot conditions during the day with little relief overnight. Highs 95 to 105 Monday, 100 to 108 Tuesday and Wednesday. Overnight lows will be in 60s to mid 70s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. Until 10 PM PDT Wednesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat.

* WHAT. Dangerously hot conditions with limited overnight relief. Afternoon high temperatures of 95 to 110 degrees. Overnight low temperatures in the 60s to mid-70s. This will pose a major risk of heat-related illness. * WHERE. Portions of north central and northeast Oregon and central, south central, and southeast Washington. * WHEN. Until 10 PM PDT Wednesday. * IMPACTS. Heat-related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS. Hottest temperatures during this long-duration heatwave are expected Tuesday.

* WHAT. Dangerously hot conditions during the day with little relief overnight. Highs 95 to 105 Monday, 100 to 108 Tuesday and Wednesday. Overnight lows will be in 60s to mid 70s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. Until 10 PM PDT Wednesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat.

Oregon Department of Environmental Quality has issued an Air Quality Advisory. IN EFFECT UNTIL 9 PM PDT TUESDAY. An Air Quality Advisory for Ozone has been issued. High levels of ozone in the lower atmosphere in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through Tuesday evening. For additional information. please visit the Web site at http://www.oregon.gov/DEQ