It would be very useful for hazard mitigation planning if these data are described in a report. For example, among $1B weather/climate events in South Dakota, well over half the damages come from drought. Very interesting, but it's unclear what can be done about that. Where does the $1B come from? Is it all agricultural loss? If so, what types of agricultural loss. 

So, are these data described in a report that we can evaluate further?