"A compilation of 100 $1 billion dollar or more U.S. disasters put together recently based mostly on a Spring 2007 NOAA NCDC document on billion dollar U.S. weather disasters (70 of them since 1980). This document expands upon that work in three ways (1) adding weather related billion dollar disasters prior to 1980, (2) adding other than weather-related U.S. billion dollar disasters - such as the Northridge Earthquake and the 9/11 Terrorist Attacks -- and (3) adding other at-hand statistics on the same disasters treated by the NCDC. This document is merely a compilation of data found in a variety of places and reflected in the sources section. There is no attempt at yet in this document to address a myriad of substantial definitional and data quality and comparison issues."
Emergency Management Institute: http://training.fema.gov/