Just reading some really interesting information on a disaster I had never heard of before but apparently certain to happen again.
Apparently every 100-200 years California experiences an apocalyptic disaster, this disaster however is not an earthquake. Instead, geological records have shown that from time to time major storms hit California resulting in truly biblical amounts of rain that often turn parts of California into inland seas for months at a time. Apparently the only documented one of these occurred in California in 1861-1862 and is nearly forgotten but caused the flooding of the entire Sacramento and Central valleys for months as well as other locations such as San Francisco and Los Angeles with flooding being reported even in Oregon and Nevada.
Geologists believe that these storms are caused by massive chains of rainstorms during the winter from the Pacific called "atmospheric rivers" and have such have named them (AR)kstorms and that California could be due for one within the next 50 years. Some simulations suggest such a storm would quickly become the biggest disaster in world history potentially causing close to 750 billion dollars in damage as well as threatening huge amounts of life and taking out one of the world's most important agriculture areas.
This by the way has nothing to do with global warming as far as we know. But possibly it could be intensified (or perhaps weakened) by climate change. Although the last few have gradually been becoming longer between occurrences, perhaps global warming makes these storms less likely than previously. But who knows...