Cuba Suffers Another National Blackout Amid Recovery Efforts

Cuba's National Electroenergetic System (SEN) suffered another nationwide blackout on Monday, marking the second such event in under 24 hours and the seventh to affect the entire island in 2026. The outage occurred during the process of restoring service following previous disruptions.

The state-owned Unión Eléctrica (UNE) attributed the latest failure to "meteorological events" that impacted the electrical grid, directly affecting online generating units and causing them to go offline. The company stated it is working intensely to reverse the situation and restore the system as quickly as possible.

This latest failure follows a total SEN disconnection reported late Sunday night, with recovery efforts initiated shortly thereafter. Earlier on Monday, UNE had reported partial restoration in Havana, with electricity returned to a significant percentage of customers and vital services like hospitals and water supply.

According to Félix Estrada, director of UNE's national load dispatch, several thermal power plants were nearing synchronization when the most recent failure occurred. The gradual restoration process has now resumed. Restoring the system is a complex and time-consuming procedure, often taking 24 hours or more. It involves initially generating power from simpler sources like solar and hydroelectric, gradually serving small areas before interconnecting them.

The primary goal is to quickly supply enough energy to the thermoelectric plants, which are the backbone of Cuba's electricity generation, enabling them to produce power in large quantities to meet demand. This latest blackout adds to a series of power supply issues, including a partial outage last Friday caused by a transmission line failure that left nearly half the island without electricity.