Pendleton, Oregon – Temperatures across eastern Oregon and southeastern Washington will climb past 100 degrees starting Sunday morning, triggering a heat advisory that stretches through 9 p.m. Tuesday and raises the risk of serious heat-related illness.
According to the National Weather Service in Pendleton, the advisory affects the Eastern Columbia River Gorge, the Lower Columbia Basin, Yakima Valley, and the Foothills of the Blue Mountains. Cities including Tri-Cities, Yakima, The Dalles, Walla Walla, and Pendleton should brace for three days of triple-digit heat.
With highs expected to peak in the afternoon and remain elevated overnight, heat illnesses are a growing concern — especially for outdoor workers, older adults, children, and anyone without access to air conditioning. Officials urge residents to limit outdoor activity to early morning or evening hours, drink water frequently, and wear loose, light-colored clothing.
Public health agencies advise checking on vulnerable neighbors and never leaving pets or children in vehicles. Residents needing cooling centers or services can call 211 or visit 211info.org in Oregon or wa211.org in Washington.
This early June heatwave could push local records and adds stress to the region’s agriculture and utilities. The advisory remains in effect through Tuesday evening, and further alerts may follow if conditions worsen.
