Its hard to even think about. The kids went to the basement for shelter and water pipes break and flood the basement. There is going to be a lot of second guessing and evaluation of the measures taken to ensure peoples safety. They were predicting the tornados a couple of days ago and said that most schools closed.
For years I've said that new homes should have one. Certainly a specific closet or some other room could be designed and constructed into a home with "safe room" standards instead of being "stick built" like the rest of a house. Same for commercial sized buildings.
Still...that all takes more money. Life is priceless, but the quality of our buildings we seek refuge in are limited by a budget.