A massive power outage left thousands of Edesur electricity users without service across the City of Buenos Aires and the Greater Buenos Aires area.
The blackout occurred during a severe heatwave, highlighting the vulnerability of the metropolitan power grid when faced with extreme weather and infrastructure failure.
The outage began Saturday night and extended into Sunday morning. The most significant impacts were reported in Parque Chacabuco, the City of Buenos Aires, and the Avellaneda district [1], [2].
Reports on the scale of the outage vary. Yahoo Noticias said that nearly 27,000 users were without supply [1], while Eldestapeweb said that at least 70,000 families were affected [2].
Emergency responders addressed a fire at an Edesur electrical substation to contain the damage. Three crews from the Bomberos Voluntarios attended the scene to extinguish the blaze [2].
The infrastructure failure coincided with an intense heatwave in the Metropolitan Area of Buenos Aires. The region experienced a heat index of 47°C [4], which contributed to a system overload as demand for cooling surged.
Local residents faced the outage during the peak of the thermal stress. The combination of the substation fire and the systemic overload created a widespread loss of service that impacted both residential and commercial sectors [2], [4].
“nearly 27,000 users were without supply”
This incident underscores the systemic risk posed by aging electrical infrastructure in the AMBA region. When extreme weather events, such as a 47°C heatwave, overlap with localized equipment failures like substation fires, the grid lacks the redundancy to prevent mass outages. The discrepancy in affected user numbers suggests a lack of real-time, transparent data from the utility provider during crises.
