Tornado-proof homes?

In the past few days, a bunch of tornadoes have done their usual damage somewhere in the mid-section of the United States, both in terms of human casualties and devastating property damage. This happens every year and yet, I don't hear much in terms of positive steps that are taken to affect new construction through architectural designs that would greatly prevent, or at the very least minimize, the impact of these terrible storms.

N.O.A.A. says that tornadoes cause an average of 70 fatalities and 1,500 injuries in the U.S. each year. So tell me, why are the communities, states and insurance companies that have so much at stake in these tornado-prone regions seem to do nothing to address both the commercial and housing construction? We seem to be much more responsive when it comes to safety in the airs and on the roads, but appear to see tornado with a fatalistic view...