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I'm interested in better understanding the ongoing geological processes that shape St. Louis and the Mississippi Valley region. So far, I've been looking into the history of seismicity in the region, focusing on the fascinating but little known history of the New Madrid earthquakes of 1811 and 1812 -- the most devastating earthquakes to have hit the US east of the Rockies. I've also been exploring how St. Louis and surrounding areas are dealing with the possibility of another earthquake occurring in the future. According to one article I read, one of the biggest uncertainties is what would happen to the heavily engineered Mississippi River in the case of another major tremblor. The shaking could break the levees, flooding wide areas along the river and creating cascading effects. The flow of the river might also reverse completely, as occurred during the New Madrid earthquakes.

On these possibilities and the lack of scientific consensus surrounding intraplate seismicity in this zone, see this article in The Atlantic.

On current efforts to create earthquake hazard maps in St. Louis, see this overview on the US Geological Survey site.

For a deeper dive into the history of the New Madrid earthquakes, see this book by historian of science Conevery Bolton Valencius. 

The largest risk at hand would be how the nautral disaster, Hurricane Sandy, affected the beaches of New Jersey, causing some the beaches to lose a significant amount of sand; this becomes a risk because the beaches weren't available to use. The beaches of New Jersey make most of the profit in tourism: the shore gaining $35.5 billion for tourism locations. This became a risk becuase there was money lost during and after the storm, as groups tried to repair the shores. In addition, the cost to repair the shores were extremely costly. Another group that received risks and hazards were the communities near the shores: they had to change their entire lifestyle when the beaches were destroyed after the storm. Those communities had to learn how to live without the beaches' resources and had to get accustomed to not going down to the shores while the beaches were being restored.