Climate change caused by humans turned an otherwise moderate drought in the south-western North America into one of the driest periods in more than 1000 years
Source:
https://www.newscientist.com/article/2240738-us-megadrought-is-being-made-more-intense-by-effects-of-climate-change/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home