A key difference between the SJ delta and New Orleans is that we Californians don't see multiple hurricanes per year. I lived in the SJ county for years and I only saw maybe 3 or 4 lightning storms, and never flooding. SJ County average annual rainfall is between 18 and 10 inches per year. Annual rainfall for New Orleans is about 57 inches per year. While the delta does present a slight chance of a problem, it is no where near as dangerous as the New Orleans leavies.
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