Lagos is facing a significant power disruption after a complete shutdown at the Egbin Power Station, Nigeria’s largest electricity generator, was compounded by a fault on a major transmission line.
The Nigerian Independent System Operator (ISO) announced the dual incidents in a statement on Thursday, warning residents of Nigeria’s commercial hub to brace for extended power shortages.
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The crisis began late on April 28 when a critical operational failure forced the Egbin Power Station to cease all generation. The plant’s output plummeted from approximately 641 megawatts to zero in a short span.
According to the system operator, the shutdown was triggered by a failure in the plant’s central compressor unit and a simultaneous malfunction of its circulating water pump system. These issues necessitated a complete safety shutdown of all generating units.
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“The Nigerian Independent System Operator wishes to inform the general public of a significant reduction in power generation currently affecting electricity supply across the country, particularly within the Lagos region,” the statement read.
“At approximately 8:21 p.m. on April 28, 2026, Egbin Power Station recorded a total loss of generation, dropping from about 641MW to zero output.”
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Exacerbating the situation is an unrelated fault on the Osogbo–Ikeja West 330kV transmission line, a vital corridor for delivering electricity to Lagos. The ISO confirmed that this transmission failure has further restricted the amount of power that can be supplied to the city’s network.
“Power supply to the Lagos region is currently further restricted due to the forced outage of the Osogbo–Ikeja West 330kV transmission line, thereby limiting the evacuation of available generation into the Lagos load centre,” the operator added.
With both generation and transmission severely constrained, system operators have initiated load-shedding measures to manage the limited supply and prevent a wider collapse of the national grid.
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Emergency interventions are underway, including the redistribution of available power among distribution companies. Priority is being given to critical infrastructure such as hospitals and security installations. Efforts are also being made to maximize output from other power plants to mitigate the impact on consumers.
The operator expressed regret for the disruption and its impact on residents in Lagos and the surrounding areas, assuring the public that restoration efforts are in progress with all relevant stakeholders.
Located in Ikorodu, the Egbin Power Station is the largest thermal power facility on Nigeria’s national grid, with an installed capacity exceeding 1,300 megawatts.
