https://drought.unl.edu/Education/DroughtforKids/WhatisDrought.aspx

https://inhabitat.com/possible-solutions-to-tackle-the-california-drought/

https://www.drought.gov/gdm/current-conditions

https://www.climate.gov/news-features/featured-images/2017-state-climate-global-drought

http://www.guinnessworldrecords.com/world-records/worst-drought-famine

http://www.shanghaibang.com/shanghai/news.php?code=&m=&mode=view&num=40904