- On Sunday, Portland hit 112 degrees, and Seattle reached 104. A rare heat dome was to blame.There is no timetable for how long a heat dome can last.Heat domes have occurred more frequently as global temperatures have increased over the years.
Much of the Pacific Northwest is currently experiencing some of the highest temperatures in the region’s history.
Portland reached 112 degrees on Sunday, the city’s highest temperature since the National Weather Service started keeping records in 1940. And Seattle hit a record high of 104 degrees the same evening, according to the National Weather Service.
It got so hot on Sunday that the U.S. Olympic track and field trials in Eugene, Oregon had to be postponed