A massive outage blacked out Argentina and Uruguay on Sunday, leaving both South American countries without electricity, power companies said.
Energy distributors in Argentina, Paraguay and Uruguay, whose populations total almost 55 million, said power was being restored to major cities, including Montevideo and Buenos Aires after being without power for at least five hours.
It added that the system went down at 7:06 am local time.
Around 34,000 customers have since had their power restored, out of millions of people affected.
The blackout comes amid a deepening economic crisis in Argentina that has left almost a third of the country in poverty, pushed interest rates skyward and sent the peso tumbling against the dollar, prompting mass protests throughout the country.
"When I started my work we didn't have any electricity in the building, the streets were empty, not a single business was open", Buenos Aires resident Maria Carrera said by phone around noon.
Hallways of Buenos Aires' subway are lit only by emergency lights during a blackout, in Buenos Aires, Argentina, Sunday, June 16, 2019.
Downtown Buenos Aires during the power cut that left nearly all of Argentina and Uruguay without electricity.
Uruguayan energy company UTE said 75 per cent of service had been restored in its country. "Something like this has never happened before", she said. Tierra del Fuego in the far south is the only area that remains unaffected because it is not connected to the power grid.
Argentina's Civil Protection Minister Daniel Russo estimated that it will take between six and eight hours to fully restore power in the country of over 44 million.
Elsewhere in Argentina, several provinces were forced to temporarily delay local elections slated for Sunday. "It's very odd, it's never been this big,", the woman said.
Since taking office, Macri has said that gradual austerity measures were needed to revive the country's struggling economy.