Losses from Hurricane Jeanne alone will be between four and eight billion, according to the company, based on "an assessment of the hurricanes characteristics at the time of landfall and its projected path."

Jeanne brings "the state's cumulative insured losses to as much as 25 billion dollars," the company said in a statement, adding that they estimate "that this aggregate loss level would occur on average once every 25- 40 years in Florida."

The calculation includes losses to insured property, but not damage to infrastructure like highways and bridges, losses to agriculture, flooding or minor damage.

A fifth storm landfalling in Florida "would be extremely rare, expected to occur only once every few thousand years," the company said.

The high cost for Jeanne "reflects the added uncertainty in damage accumulations likely at many locations."

Charley, which hit Florida in August, left insured losses of between six and eight billion dollars, while Frances -- like Ivan that followed -- left losses of between three and six billion dollars.

Risk Management Solutions specializes in asessing risks of terrorism, natural disaster and weather -- what they consider "catastrophe risk management."