BUENOS AIRES, Argentina (AP) — A massive blackout left tens of millions of people without electricity in Argentina and Uruguay on Sunday after an unexplained failure in the neighboring countries' interconnected power grid. Authorities were working frantically to restore power, but by mid-afternoon about half of Argentina's 40 million people were still in the dark.
Voters cast ballots by the light of cell phones in gubernatorial elections in Argentina. Public transportation halted, shops closed and patients dependent on home medical equipment were urged to go to hospitals with generators.
"I was just on my way to eat with a friend, but we had to cancel everything. There's no subway, nothing is working," said Lucas Acosta, a 24-year-old Buenos Aires resident. "What's worse, today is Father's Day. I've just talked to a neighbor and he told me his sons won't be able to meet him."
By mid-afternoon, power had been restored to most of Uruguay's 3 million people. But in Argentina, only about 50% of the nation's grid was back up and running, President Mauricio Macri said on Twitter, and officials from the Energy Secretariat were rallying to establish full service to all users.
Argentina's power grid is generally known for being in a state of disrepair, with substations and cables that were insufficiently upgraded as power rates remained largely frozen for years.
The country's energy secretary said the blackout occurred around 7 a.m. local time when a key interconnection system collapsed, but the causes were "being investigated and are not yet determined."
Brazilian and Chilean officials said their countries had not been affected.
Officials were not immediately available for comment, but many residents of Argentina and Uruguay said the size of the outage was unprecedented in recent history.
"I've never seen something like this," said Silvio Ubermann, a taxi driver in the Argentine capital. "Never such a large blackout in the whole country."
Argentine energy company Edesur said on Twitter that the failure originated at an electricity transmission point between the power stations in Yacyretá and Salto Grande in the country's northeast.
Uruguay's energy company UTE said the failure in the Argentine system cut power to all of Uruguay at one point and much of Argentina. The company said that some Uruguayan coastal cities had service by early afternoon and blamed the collapse on a "flaw in the Argentine network."
Argentina's secretary of energy said the power failed at 7:07 a.m. Only the southernmost province of Tierra del Fuego was unaffected.
"The cause is still under investigation," the energy secretary's office said.
Argentine electric company Edesur said that some 450,000 clients had power restored by 11:53 a.m., with hospitals taking priority. Uruguayan officials did not provide the number of clients with power back, but a growing list of regions with service indicated that restoration was progressing faster there.
Several Argentine provinces had elections for governor on Sunday, which proceeded with voters using their phone screens and built-in flashlights to illuminate their ballots.
"This is the biggest blackout in history, I don't remember anything like this in Uruguay," said Valentina Giménez, a resident of the capital, Montevideo. She said her biggest concern was that electricity be restored in time to watch the national team play in the Copa America football tournament Sunday evening.
Since taking office, Macri has said that gradual austerity measures were needed to revive the country's struggling economy. He has cut red tape and tried to reduce the government's budget deficit by ordering job cuts and reducing utility subsidies, which he maintained was necessary to recuperate lost revenue due to years-long mismanagement of the electricity sector.
According to the Argentine Institute for Social Development, an average family in Argentina still pays 20 times less for electricity than similar households in neighboring countries.
The subsidies were a key part of the electricity policy of President Néstor Kirchner's 2003-2007 administration and the presidency of Kirchner's wife and successor, Cristina Fernández in 2007-2015. Fernandez is now running for vice president in October elections.
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