* WHAT. Hot conditions with temperatures around 100 degrees expected. This will pose a moderate to major risk of heat-related illness. * WHERE. Eastern Columbia River Gorge of Oregon and Washington, Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Kittitas Valley, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN. From noon Saturday to 8 PM PDT Monday. * IMPACTS. Hot temperatures may cause heat illnesses. 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. * ADDITIONAL DETAILS. Temperatures are expected to peak on Sunday. Afternoon highs may reach as high as 105 degrees across the lower Columbia Basin.
