In the 1862 megaflood the California State government was under 6 feet of water for around 6 months in Sacramento from the flooding and so the state government moved from Sacramento to San Francisco by boat since San Francisco is built on hills on the Peninsula. Also, California was known as a cattle state but so many cattle died by drowning and were mostly washed out to sea on the Sacramento River during this time that California went from being a Cattle State to a Farming State because so many cattle ranchers and their families died in the floods or were bankrupted by the loss of their cattle or both. Also, during the most extreme flooding times the Sacramento River was over 20 miles wide. Or if you live in Los Angeles or have looked out to sea at Catalina Island, that is 26 miles from Long Beach and Los Angeles Coast.
Since this is likely to happen any year now because of the cycles (unless Global Climate change has somehow changed this cycle) it might be good to prepare if you can for another one of these. By studying what happened before you can partly protect yourselves from future incidents like the cyclical ones in the past.
This is a partial quote of:
USGS sediment research in the San Francisco Bay Area, Santa Barbara Basin, Sacramento Valley, and the Klamath Mountain region found that "megastorms" have occurred in the years: 212, 440, 603, 1029, c. 1300, 1418, 1605, 1750, 1810, and, most recently, 1861–62. Based on the intervals of these known occurrences, ranging from 51 to 426 years, for a historic recurrence of, on average, every 100-200 years.[3]
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