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In findings announced on August 2, 2011, US researchers state that some 1,000 kilometers of an impenetrable border fence separating sections of the United States and Mexico is also hampering the range of wildlife movement by up to 75%, raising the extinction risk of several already endangered species.

http://www.sott.net/articles/show/232885-United-States-Border-Fence-Threatens-Wildlife
http://www.nature.com/news/2011/110802/full/news.2011.452.html

In North Darfur, Sudan, extreme drought as of the beginning of August 2011 is causing farmers to suffer crop failure, with concerns being raised of an emerging famine by summer 2012 if the dry conditions continue.  

http://reliefweb.int/node/439413  
http://www.radiodabanga.org/node/17095  

With a heat-related death toll that has reached 26 for the states of Oklahoma and Texas, USA, high temperature advisories are posted on August 5, 2011 across 15 states, with Texas also experiencing the worst drought on record.    
http://edition.cnn.com/2011/US/08/04/heat/index.html
http://www.chinadaily.com.cn/world/2011-08/03/content_13041791.htm
http://www.chron.com/disp/story.mpl/ap/tx/7680822.html
http://newsok.com/heat-death-toll-rises-to-13-in-oklahoma/article/3591332?custom_click=headlines_widget