The heat wave baking the U.S. Pacific Northwest and British Columbia, Canada, is of an intensity never recorded by modern humans. These are all-time heat records for select cities prior to the current heat wave. Pacific Northwest heat waveSunday and Monday are projected to be the hottest days of the heat wave along the Northwest coast from Portland to Seattle. As all-time record heat approaches the Pacific Northwest, a look at future climate change projections - graph shows annual mean temperature in Oregon 📈 + Oregon Climate Assessment (see fig. "I do indeed believe that the phenomenon we describe in our work played a very important role in the record heat wave," Mann said.