Overview
- Regulators reported a peak of roughly 1,085,000 users without electricity between 1:30 and 4:00 a.m., with outage tallies swinging sharply as systems updated.
- Edesur said a failure at its Bosques substation propagated to multiple sites and pledged staged restorations, noting that more than half of affected customers regained service overnight.
- Thousands of users remained without power into January 1, with persistent complaints across CABA neighborhoods such as Almagro, Recoleta and Parque Patricios and in southern Greater Buenos Aires including Avellaneda, Quilmes and Berazategui.
- The blackout struck during severe heat that drove peak demand, and ENRE flagged parts of the network operating beyond nominal limits, including overloaded cables and transformers.
- Local hardships were pronounced in La Plata, where residents described celebrating in the dark and reported simultaneous water outages, urging emergency support for refrigerated medicines and care facilities.