From the National Hurricane Center (via Anthony Watts):
A team of scientists have found that the economic damages from hurricanes have increased in the U.S. over time due to greater population, infrastructure, and wealth on the U.S. coastlines, and not to any spike in the number or intensity of hurricanes. "We found that although some decades were quieter and less damaging in the U.S. and others had more land-falling hurricanes and more damage, the economic costs of land-falling hurricanes have steadily increased over time," said Chris Landsea, one of the researchers as well as the science and operations officer at NOAA's National Hurricane Center in Miami. "There is nothing in the U.S. hurricane damage record that indicates global warming has caused a significant increase in destruction along our coasts."
If this is true for hurricanes, it's likely to be true for any other natural disaster. As you have more people living in more places, extreme weather will cause more property damage. The report concludes that "Even Hurricane Katrina is not outside the range of normalized estimates for past storms." And that's a consensus conclusion.