 I'm Shannon Milburn in the Gorge News Center. The National Weather Service is issuing an excessive heat warning in effect from 11 a.m. Saturday to about 10 o'clock Monday evening. Dangerously hot conditions with temperatures of 100 to 110 degrees expected over the weekend. This will pose a major risk of heat-related illnesses. Portions of central, north-central and northeast Oregon and central, south-central and southeast Washington will be affected by this.