There is no direct link between a particular storm and global warming. What scientists know is that ocean temperatures are getting warmer, sea levels are rising, and the atmosphere contains more moisture because the air is warmer.
All of these factors can lead to more severe storms and more coastal flooding. Events that were "100 year floods/droughts" will occur more often. Storm surges that had no effects before will now be more likely to cause flooding.
Ransom can laugh about global warming on the east coast. He may not be as amused about its effects on the snow melt in the Rockies (http://www.doi.gov/news/pressreleases/USGS-Study-Finds-Recent-Snowpack-Declines-in-the-Rocky-Mountains-Unusual-Compared-to-Past-Few-Centuries.cfm)