* WHAT...Dangerously hot conditions with temperatures of 95 to 100 degrees F expected.
* WHERE...Portland Metro Lowlands, Western Columbia River Gorge, Portland West Hills and Chehalem Mountain, Inner Vancouver Metro, and East Clark County Lowlands.
* WHEN...Until midnight PDT tonight.
* IMPACTS...Heat related illnesses increase significantly during extreme heat events.
* ADDITIONAL DETAILS...Today will be the hottest day of the week with temperatures cooling down on Tuesday.