Munich Re, a major reinsurance company, this summer released a very interesting report on natural disasters, and the data suggests that, as one newspaper columnist put it, it's not your imagination. The weather really is getting worse. Click on that link, and take a look at the chart you'll see.
Munich Re's full report is online and entitled the 2011 Half-Year Natural Catastrophe Review. There's also a 47-minute webinar on the topic posted online.