I was taught in college astronomy that not only was there an 11 year cycle, there was also a 22, 44, and 88 year cycle. Going back to 88 years gives us 1930, going right into the severe years of the dust bowl and the Great Depression. Fortunately, our changed agricultural practices mean our 88th years will not be as severe as those for the early 1930s. I predict that our world drought conditions will be more severe over the next 4 or 5 years.
In Cape Town South Africa they have a severe water shortage that is getting worse. A number of other big cities are facing similar problems.