Estimated Financial Toll Of Natural Disasters In U.S. To Date In 2011 - $32 Billion

All told the US has suffered 99 weather-related disasters over the past 31 years, where overall damages and economic costs reached or exceeded $1 billion. The normalized losses (that is, the numbers adjusted for the GNP inflation index) add up to more than $725 billion for those 99 disasters. So far, nine natural disasters, each totaling more than a billion dollars in losses, have befallen the US this year. Here's the NCDC list:

Groundhog Day Blizzard Jan 29-Feb 3: Insured losses were greater than $1.1 billion. Total losses (insurance, state and local snow removal, business interruption) were greater than $3.9 billion. Thirty-six deaths.

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Midwest/Southeast Tornadoes April 4-5: An estimated 46 tornadoes caused more than $1.4 billion insured losses, total losses greater than $2 billion, 9 deaths.
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Southeast/Midwest Tornadoes April 8-11: An estimated 59 tornadoes caused more than $1.5 billion insured losses, total losses greater than $2.2 billion, numerous injuries, no known deaths.
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Midwest/Southeast Tornadoes April 14-16: An estimated 160 tornadoes caused more than $1.7 billion insured losses, total losses greater than $2 billion, 38 deaths .

EDIT

http://motherjones.com/blue-marble/2011/07/new-normal-billion-dollar-disasters