* WHAT...Hot conditions with temperatures up to 102 degrees expected. This will pose a moderate to locally major risk of heat-related illness. * WHERE...Lower Columbia Basin of Oregon and Washington, Grande Ronde Valley, Wallowa County, Foothills of the Northern Blue Mountains of Oregon, Kittitas Valley, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...Until 9 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses.