School Closings and Delays Today (September 18, 2025)

Here is the detailed list of school closings and delays in the USA for September 18, 2025:

South Lyon Community Schools (Michigan): Schools were scheduled to reopen on this day after a three-day shutdown due to a cybersecurity issue that began on September 14, 2025.
Clifton Public School District (New Jersey): Both CCMS and WWMS had a “Back-to-School Night” scheduled for this evening.
Caroline County Public Schools (Maryland): A “Special Education Workshop” was scheduled for the evening.
Andover Public Schools (Massachusetts): An “ASC Workshop & Regular Meeting” was scheduled for the evening.

School / District	Location	What Happened	Effect (Closure / Delay / Other)
Windsor Public Schools	Windsor, Connecticut	Police activity causing road closures around Matianuck Ave, Park Ave, Matthew Lane, Pepperbush Way	Late dismissal; dismissal delayed for high school; middle & elementary also impacted.
Uvalde Consolidated Independent School District	Uvalde, Texas	Ransomware attack that disrupted key systems: phones, air conditioning, security cameras, and payroll platform	Schools closed Monday through Thursday to address the tech/security issues.

For the most current information on school closings or delays in specific areas, it’s advisable to check local news outlets or official school district communications.

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