"California's 'big one' might be a megastorm"
"... the most severe storm event on record in California, a 45-day series of storms that started in December 1861 and, according to the Geological Survey, caused such extensive flooding that the Sacramento Valley was turned into 'an inland sea, forcing the state Capitol to be moved temporarily from Sacramento to San Francisco, and requiring Gov. Leland Stanford to take a rowboat to his inauguration.' ... " [More]