Looks like them savages wasn't all that dumb after all:
We are informed that the Indians living in the vicinity of Marysville left their abodes a week or more ago for the foothills predicting an unprecedented overflow. They told the whites that the water would be higher than it has been for thirty years, and pointed high up on the trees and houses where it would come. The valley Indians have traditions that the water occasionally rises 15 or 20 feet higher than it has been at any time since the country was settled by whites, and as they live in the open air and watch closely all the weather indications, it is not improbable that they may have better means than the whites of anticipating a great storm.
As has been mentioned here previously, the west coast - from California to British Columbia - has a long history of cyclic change, and it doesn't have anything to do with "man-made climate change". In general, California gets hit hardest during the 200-year cycle, and the Indians living there had long viewed the Central Valley as a 300 mile-long, 20 mile wide inland sea.
In the megaflood of 1861-1862, thousands of lives were lost. The capital was moved from Sacramento to San Francisco. The economy was decimated, forcing the state into bankruptcy (which now is no longer allowed). And yet:
Today, the same regions that were submerged in 1861-62 are home to California’s fastest-growing cities.
Yep, this seems like a great time to push to secede from the USA. Those who ignore history are doomed to repeat it. If it could be done quickly, I'd support the smug folks pushing for secession.