I have my house in order: hurricanes, Bird Flu, terrorist attacks, etc. If nothing happens, nothing lost. Regardless, I must be ready for hurricanes.
Also on the water contamination note 2 people may have been infected swimming in contaminated waters and if you want to read about it use the link above reference page 11.
I actually expect a terrorist attack to be a bigger problem than this....not that this couldn't be a problem....just the odds seem better on terror....or earthquakes....or the Mt. Rainier blowing up...