Not intuitive
It seems to me this map is currently oriented toward tornadoes because of the recent disasters in the Southeast. To my way of thinking, floods are responsible for the most natural disasters. Remember that the greatest, most widespread damage done by Katrina in New Orleans was not wind damage but the ensuing floods caused by the breaching of levees and flood walls. In fact, hurricane insurance in NO is separate and costly and is really flood insurance.
Because I live five miles from the San Andreas Fault and, in fact, have experienced a major earthquake on the second day of the World Series in 1989 (Loma Prieta) I certainly agree with tech_ed above: How are west coast states at a lower risk of natural disaster than, say, Dallas?
