11 Million
Number, from U.S. census, of people living in possible storm surge flood zones.

March 1993
“Storm of the Century,” also know as the “ ’93 Superstorm,” hits Eastern U.S.

1 Trillion
Gallons of water precipitated by an average hurricane (per day)

Minimum ocean temperature, in degrees Fahrenheit, required for hurricane formation.

39 mph
Wind speed at which a tropical depression classifies as a tropical storm, and is named by the National Hurricane Center.

74 mph
Wind speed at which a tropical storm becomes a hurricane.

Square miles of marsh transformed into open water by hurricanes Katrina and Rita.