Yes, there is another usage for that word.
Up here, the two determining factors seem to be bus transportation and the safety of children on side streets. The major thoroughfares can seem to be easily traversed but the schools will still close if it's not considered safe for kids to stand on street corners in their own neighborhoods and wait for buses in the AM. Early dismissals happen if the prediction of bad weather might cause transportation problems returning kids home who live on those side streets. I'm sure either of these situations causes parents to scramble. News folks love to jump on such stories using their own hindsight as to whether the decision to close was justified or not. I'd not want to be part of that decision making process. School superintendents will be criticized for whatever that decision is.
The weather today was odd. It snowed, but the temperatures stayed in the high 30s. Once the snow picked up (about noon or a bit before) schools had to make some choices. I noticed that several local school districts closed on VERY short notice. Schools around here generally let out about 3:00 PM so a 1:30 closing time does not represent much loss of time, but announcing a 1:30 closing at 1:00 was surprising.
I know some parents who were NOT impressed. I don't know what the district does if parents cannot pick up children early when the district makes silly decisions like this.
FWIW: there was still no safety problem driving this evening, hours after regular school closing.

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