http://www.wonderslist.com/10-worst-natural-disasters-21st-century/
http://www.bbc.co.uk/news/science-environment-22398684
https://en.wikipedia.org/wiki/2011_East_Africa_drought
https://www.theguardian.com/world/2012/jan/18/east-africa-drought-disaster-report
http://www.aljazeera.com/news/2017/05/deadly-earthquake-hits-iran-north-khorasan-province-170514094725070.html
http://www.dailymail.co.uk/news/article-204747/40-000-feared-dead-Iran-earthquake.html
https://en.wikipedia.org/wiki/2003_Bam_earthquake
https://en.wikipedia.org/wiki/Hurricane_Katrina
http://edition.cnn.com/2013/08/23/us/hurricane-katrina-statistics-fast-facts/index.html
https://en.wikipedia.org/wiki/2001_Gujarat_earthquake
http://news.bbc.co.uk/onthisday/hi/dates/stories/january/26/newsid_4666000/4666568.stm
http://www.ibtimes.co.in/2001-gujarat-earthquake-when-india-faced-one-its-worst-disasters-14-years-ago-photos-621365
https://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami
http://www.bbc.co.uk/news/world-asia-34464815
https://en.wikipedia.org/wiki/2005_Kashmir_earthquake
https://en.wikipedia.org/wiki/Cyclone_Nargis
https://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami
https://www.dec.org.uk/articles/haiti-earthquake-facts-and-figures