With the east cost bracing for Sandy's war path, you may be curious to learn what were the most expensive hurricanes in history. Will Sandy beat these disasters out? Hurricane season is almost upon us, with some meteorologists predicting an above-average level of tropical storm activity during the 2012 hurricane season. If that comes to pass, and we really do have to contend with storms that are either stronger in severity or stronger in number than in previous years, it might be helpful to take a look back at the worst that previous hurricane seasons have had to offer. These storms have caused more than $4 billion in damages and they just continue to rise from there each month. Here are the 10 most expensive hurricanes to collide with American shores.