Not what you might think.
Link to July 29 Seattle Times article, "5 library branches hit 90 degrees inside, are closed".
Four of the affected locations are historic buildings without air-conditioning, including this beautiful 1910 Carnegie.
The temperature reached 103 degrees in Seattle on Thursday, July 29 -- the city's hottest day ever. Unlike most other parts of the U.S., air-conditioning is not the norm here. According to numerous other news stories, only 30% of King County Metro buses are air-conditioned.
Current weather conditions in Seattle? Closer to what those of us who live outside the Pacific Northwest would expect: 66 and hazy, with a few showers possible. Must feel downright chilly compared to last Thursday.