https://www.breitbart.com/national-security/2019/06/17/tens-of-millions-caught-in-south-american-continental-blackout/
The blackout reportedly began at approximately 07:00 a.m. local time Sunday, halting trains and plunging millions of people into darkness. A failure in an electrical grid serving both Argentina and Uruguay caused the outage, although countries including Chile, Brazil, and Paraguay were also affected.
the outage took several hours to restore