From California Water Research – In 2018, Daniel Swain, Baird Langenbrunner, J. David Neelin & Alex Hall published a study [1] of the increased frequency of extreme flood events such as the Great Flood of 1862. Swain et. al. suggested “that California’s major urban centers (including San Francisco and Los Angeles) are more likely than not to experience at least one such extremely severe storm sequence between 2018 and 2060 on a business-as-usual emissions trajectory.”  (more)