Such as the megadrought that led to the collapse of the local population in 16th Century Mexico.
The Southern States of the US are now experiencing what may be the worst drought in 500 years…
The worst, in fact, since Aztec times…
We still do not understand the climate oscillations well enough to forecast exactly how they will fluctuate in the future but some scientists are predicting that we are now at the start of a thirty year period of drought…