I leave it up to parents to come or not to come. I do plan ahead and make sure I have foods that don't need cooked such as cold meats, cheese, crackers etc. and have them cut up ready to go just in case I need to grab them and head for the basement or whatever. I have flashlights charged so we can see if the power goes out and generally on stormy days plan to stay upstairs to do things instead of being in the basement where it is harder to monitor the weather and really dark if the power goes out.

In most cases if it is that bad parents are staying home too or will go to work but then be sent home early to get their kids.

Mostly it is life as normal just with some extra precautions in place ahead of time.