Reuters: Some of Brazil's most populous regions suffered sporadic power outages on Tuesday, raising election-year fears of shortages in a country with a long history of blackouts. The shortages, which occurred during record heat and low reservoir levels at the country's hydroelectric plants, were caused by short circuits in transmission lines in the north-central state of Tocantins, said Brazil's national grid operator, ONS. The outages extended to as many as 6 million consumers and industrial users in...