According to the IRS - http://www.irs.gov/newsroom/article/0,,id=152734,00.html and IRS Publication 4492, Information for Taxpayers Affected by Hurricanes Katrina, Rita, and Wilma - http://www.irs.gov/pub/irs-pdf/p4492.pdf
The IRS provides examples of an economic loss that include, but are not limited to:
The IRS doesn't provide any limit on amount of loss and doesn't relate the amount of loss to the amount of distribution, but states that qualified hurricane distributions are permitted without regard to your need or the actual amount of your economic loss.
The total of your qualified hurricane distributions from all plans is limited to $100,000.
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