Takeaways Article: "It already has happened in 1862, and it probably has happened about five times per millennium before that. On human time scales, 100 or 200

Takeaways Article: "It already has happened in 1862, and it probably has happened about five times per millennium before that. On human time scales, 100 or 200 years sounds like a long time. But these are fairly regular occurrences." Wikipedia on 1862 flood: "The event dumped an equivalent of 10 feet (3.0 m) of rainfall in California, in the form of rain and snow, over a period of 43 days." I'm surprised I haven't heard of it before.