Webthat’s how the national weather service described the historic heat wave hitting the pacific northwest, pushing daytime temperatures into the triple digits,. Through tuesday, at least 36 locations in the western u. s. Webin yakima, washington, a high of 107°f is projected for tuesday, surpassing the previous daily record of 103°f set in 2021. Weba yakima valley weather record fell sunday as the high temperature hit 109, which topped the june record set in 2015. According to the national weather. Webthe data show that around noon on that day, surface temperatures in seattle reached 120°f (49°c), and the worst was yet to come. By june 26, excessive heat warnings.