Weather disasters keep costing U.S. billions this year

Blizzards. Tornadoes. Floods. Record heat and drought, followed by wildfires. The first eight months of 2011 have brought strange and destructive weather to the United States. From the blizzard that dumped almost two feet of snow on Chicago, to killer tornadoes and heat waves in the south, to record flooding, to wildfires that have burned more than 1,000 homes in Texas in the last few days, Mother Nature has been in a vile and costly mood.