Overview
- Power cuts began late on December 30 and surged in the early hours, with the ENRE confirming a peak of about 1,085,000 users affected between 1:30 and 4:00 a.m.
- Edesur attributed the event to a failure at its Bosques substation that cascaded to other stations, and said service was restored in stages with more than half of affected customers reconnected by around 4 a.m.
- As of January 1, thousands remain without electricity, with ENRE reports putting the total at roughly 13,000 users still offline as normalization work continues.
- ENRE dispatched technicians to the Bosques site, requested a detailed technical report from Edesur, and continues a formal investigation into the causes and responses.
- A severe heat wave drove unusually high demand, with the regulator noting cables operating above rated capacity and heavily loaded transformers, and the worst impacts concentrated in southern Greater Buenos Aires and neighborhoods such as Almagro, Recoleta, Flores and Parque Patricios.