* WHAT. High temperatures between 90 and 102 degrees. Overnight lows in the upper 50s to mid 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. High temperatures between 90 and 102 degrees. Overnight lows in the upper 50s to mid 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Hot temperatures will affect anyone without effective cooling and adequate hydration.

* WHAT. Afternoon high temperatures of 95-103 degrees and overnight low temperatures of 62-70 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE. Lower Columbia Basin of Oregon and Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT. Afternoon high temperatures of 93-101 degrees and overnight low temperatures of 60-68 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE. In Oregon, Foothills of the Northern Blue Mountains of Oregon. In Washington, Foothills of the Blue Mountains of Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT. High temperatures between 93 and 104 degrees. Overnight lows in the upper 50s to mid 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. Afternoon high temperatures of 94-102 degrees and overnight low temperatures of 62-70 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE. In Oregon, Foothills of the Northern Blue Mountains of Oregon. In Washington, Foothills of the Blue Mountains of Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT. Afternoon high temperatures of 95-103 degrees and overnight low temperatures of 63-71 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE. Lower Columbia Basin of Oregon and Washington. * WHEN. From 9 AM Monday to 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT. High temperatures between 93 and 104 degrees. Overnight lows in the upper 50s to mid 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. From 9 AM this morning to 9 PM PDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. High temperatures between 93 and 104 degrees. Overnight lows in the upper 50s to mid 60s. * WHERE. Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN. Until 9 PM PDT Tuesday. * IMPACTS. Hot temperatures may cause heat illnesses.

* WHAT. Hot conditions with temperatures up to 100 degrees. This will pose a moderate to major risk of heat-related illness. * WHERE. In Oregon, Foothills of the Northern Blue Mountains of Oregon. In Washington, Foothills of the Blue Mountains of Washington. * WHEN. Until 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.

* WHAT. Hot conditions with temperatures up to 103 degrees. This will pose a moderate to major risk of heat-related illness. * WHERE. Lower Columbia Basin of Oregon and Washington. * WHEN. Until 9 PM PDT Tuesday. * IMPACTS. Extreme heat will significantly increase the risk of heat-related illnesses for much of the population, especially those who are heat sensitive and those without effective cooling or adequate hydration.