The school board held an executive session Monday night to discuss building security and announced the one-day closure.
The Grant County town has about 500 students in four schools.
The website iFIBER One News reports Soap Lake school board President Jerry Bessett declined to elaborate on the threats. But, he says the district is shutting down due to safety concerns for students and staff.
Last week a 16-year-old Soap Lake High School student was arrested after he made threats to kill school staff and students.