I don't work for a school,and I am not too sure what you mean by a "situation", but the Mr. is a Police Officer. A while back we had a bomb threat, and the entire HS was evacuated ASAP to across the streets from the school, and the busses ran as quickly as the drivers could be located. Announcements were made on radio and TV for parents to pick up their children across the streets from the school, and it was checked that "walkers" were well away from the building. (Threat came to naught).

Last spring we had a very close call with a tornado just as school was letting out. Kate usually walks home, but as it was pouring buckets of rain, I went to pick her up. I discovered that ALL students were being held inside until the Tornado Warning expired, and parents in the parking lot had to wait. If a parent went inside after a child, the parent was given the option of waiting inside or leaving without the child. Most stayed inside as they were unaware of the severity of the weather situation and the school is one of the safest buildings in town.

I was aware of the severity of the storm, and had been spotting just moments before. I decided that the tornado would miss our town, and went to pick up Kate only because of the rain. I was correct, the tornado missed us, but so was the school correct in holding the students until all danger had passed. They were much safer inside than they would have been in busses or walking.