Unprecedented heat settled over the region for nearly five days between June 25 and June 30.
Initial forecasts of 107 degrees were enough for health officers to sound the alarm. The regional Health Officer called the heat "life-threatening," and urged all residents to get to a cool space. For the first time in history, Multnomah County opened 24-hour cooling centers.
Temperatures exceeded officials' worst fears and shattered records, reaching 116 degrees. More than 60 people lost their lives.