Fernando Ravera uses a lighter to navigate the stairs of his apartment building that has been without electricity for four days in a row, in Buenos Aires, Argentina, Thursday, Feb. 18, 2016. The city’s energy system has been unable to cope with a summer heat wave, prompting some residents to block streets in protest. The government began rationing electricity on Thursday, affecting thousands of homes and businesses in the capital and surrounding towns. (AP Photo/Natacha Pisarenko)

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