The United Nations, which marked World Day to Combat Desertification on 17 June, describes drought as the "world's costliest natural disaster".
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/new-water-based-technology-can-help-curb-impact-drought
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/guardian-uk
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/droughts
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/brazil
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sri-lanka
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/irrigation