Energy sector unions in Colombia warn that the country faces a more than 50% probability of a nationwide blackout by 2027 [1].
This warning signals a potential crisis for the national economy and public infrastructure, as the electrical grid struggles to keep pace with environmental pressures and structural deficiencies.
Camilo Sánchez, president of the National Association of Public Service Companies (Andesco), said the risk is driven by a combination of structural failures in the electrical system and a significant deficit in power generation. According to industry data, the country lacks the equivalent of a 600 MW thermal plant or a 2,400 MW solar park [2].
Environmental factors are compounding these technical gaps. A heat wave associated with the El Niño phenomenon is expected by late 2026 [1]. This weather pattern typically increases energy demand while stressing the existing infrastructure, potentially triggering the blackout in 2027 [1].
Sector leaders said the risk of severe power disruptions will persist for two to three years if generation capacity is not increased [2]. The deficit in thermal and solar energy means the grid lacks the necessary buffers to handle peak loads during extreme weather events.
Andesco and other energy guilds said that without immediate investment in new generation projects, the system will remain vulnerable. The gap in megawatts represents a critical failure to modernize the grid in anticipation of climate-driven demand spikes [2].
“the country faces a more than 50% probability of a nationwide blackout by 2027”
The warning from Andesco highlights a precarious intersection between climate change and infrastructure lag. By linking the 2026 El Niño heat wave to a 2027 blackout, the energy sector is signaling that Colombia's current energy transition is not moving fast enough to mitigate the risks of extreme weather, potentially forcing the government to accelerate thermal or solar investments to avoid economic paralysis.
