Extreme Heat Warning

* 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 11 PM PDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* ADDITIONAL DETAILS...Monday will be the hottest day of the week with temperatures cooling down on Tuesday. Overnight temperatures will remain elevated tonight into Monday morning, and Monday night into Tuesday morning. Night time temperatures ranging from 63 to 67 degrees F will lead to poor overnight relief. There is currently a 10-20% chance that night time temperatures remain above 70 degrees F tonight into Monday morning, and a 1-2% chance Monday night into Tuesday morning.