Redmond youngsters Swen Richter, 9, (left) and Addie Lewis, 6, build a sand castle at the Idylwood Beach Park on Wednesday, when temperatures hit 80 degrees.
The beach park on Lake Sammamish was a popular spot for local residents to relax, swim and cool off.
Is is supposed to cool off today, but temperatures are expected to be in the 70s for this weekend.