I agree. Most of us older public schoolers walked miles to schools in the sub zero freezing cold, ice and snow, going uphill both ways

We live in litigious times. School administrators/Boards are probably afraid of potential "frivolous" lawsuits from students' parents alleging this or that trauma caused by keeping a school open. Honestly I would not want to be in the position if I needed to make that call It's a "no winner." Extreme cold makes sense; it seems that many students around here nowadays have no clue about cold weather clothing or awareness nor even how to zip up their jacket zippers.
They did close the schools around here for "Inga." Most of the school closing around here are usually caused by broken watermains/pipes causing extensive damages by the resultant flooding.