People exercise in Barra da Tijuca beach during the sunrise in Rio de Janeiro January 31, 2014. This has been the hottest January on record in parts of Brazil, and the heat plus a severe drought has fanned fears of water shortages, crop damage, and higher electricity bills that could drag down the economy during an election year for President Dilma Rousseff. REUTERS/Ricardo Moraes (BRAZIL - Tags: ENVIRONMENT ENERGY POLITICS)