Cuba suffered a nationwide power blackout again, described by residents as life becoming “agony,” marking the third major blackout across the country in just six months.

Cuban authorities said the electrical system saw a “complete disconnection” and that officials were investigating the cause. State media later reported that parts of the grid—“microsystems”—were beginning to restart in different territories, but widespread outages continued as restoration efforts went on.

The blackout comes amid worsening shortages and broader strain on the country’s aging power infrastructure. In recent days, the government has pointed to energy shortfalls and disruptions to fuel supply as key pressures on generating capacity.

Officials have also highlighted dependence on limited sources of power, including domestic production and alternative generation, while warning that meeting demand remains difficult. In the meantime, daily life has continued to be disrupted by repeated blackouts, affecting water systems, refrigeration, transportation, communications, and healthcare operations.

The latest outage adds to mounting public frustration, with residents reporting that even basic needs have become harder to manage as blackouts persist.