Xcel takes the blame for those blackouts in Denver.  Some interesting info about how the power system works.  

Meanwhile, Uruguay limits night sports events due to energy crisis. A drought has affected their hydroelectric dams.  

And in Nigeria, a group is protesting the incessant power outages, using the motto Let there be light.

During the protest, the groups prayed that any staff of the nation's sole energy supply outfit, PHCN, who had a hand in the unimpressive power situation in the country, should die.

Members of the protesting groups carried placards, some of which had inscriptions like, "Say No to Darkness", "Say No to Crazy Bills," "Fight the Monster: End the Darkness" "Light is Wealth", "No light: No Life" etc. Others wore uniform T-Shirts with inscriptions that read, "No Light; No Job." "The Siege is over," No light: No Nation," No Light, No Progress."

An understandable sentiment, but however incompetent or malevolent the employees, after they died en masse the replacements might be even worse.
Lagos would be a very interesting place to be with no light at night.  Lagos crime rate is high as it is, but imagining it with the city in darkness at night is quite chilling.  Povery, population density, failed promises of oil wealth all together with failing electricity adds up to a frightening picture.  
This looks like Richard Duncan's "Olduvai Cliff" beginning.  Is it reasonable to imagine this as a syndrome that will creep through the world's impoverished mega-cities in the near term?  
Matt, dc