Nigeria experienced a severe electricity supply disruption on Monday, October 19, 2026, after power generation on the national grid plunged from approximately 3,840 megawatts (MW) at 7 a.m. to just 476.70MW by 1 p.m., leaving several major generating stations without recorded output and triggering electricity outages in parts of the country.
Data obtained from the Nigerian Independent System Operator (NISO) showed that the country lost 3,363.30MW of generation within six hours, representing a decline of approximately 87.6 per cent. The sharp reduction raised concerns about the stability of the electricity system, although the grid operator disputed suggestions that a nationwide collapse had occurred.
According to the operator's generation dashboard, electricity output remained relatively stable during the morning before falling sharply at approximately 12:40 p.m. The disruption left several major generating stations recording zero output, significantly reducing the amount of electricity available for distribution.
Among the affected facilities were Egbin, Jebba, Shiroro and Kainji power stations, alongside several gas-fired generating plants. These facilities are important contributors to Nigeria's electricity supply, making the simultaneous reduction in their recorded output particularly significant.
By 1 p.m., only a small number of generating stations were still contributing electricity to the national grid. Odukpani National Integrated Power Project, Omotosho and Sapele were among those reporting generation, although their combined output remained insufficient to maintain the level recorded earlier in the day.
At approximately 1:23 p.m., the NISO dashboard showed generation hovering around 480MW, with only five generating companies reporting electricity production.
The disruption coincided with complaints from electricity consumers who reported interruptions in supply between approximately 12:45 p.m. and 1:20 p.m. The outages affected households and businesses already facing challenges associated with inconsistent electricity availability.
In Lagos, Ikeja Electric confirmed that customers across its distribution network were experiencing reduced electricity supply because of a shortfall in the amount of power allocated to the company from the national grid.
In a public notice issued on Monday, the distribution company explained that the reduction in supply hours was directly linked to the limited electricity available for distribution.
The company said it was engaging relevant stakeholders to improve the situation and assured customers that the electricity received from the grid would be distributed as efficiently and fairly as possible.
Ikeja Electric also acknowledged the inconvenience caused by the disruption and appealed to customers for patience while efforts continued to improve supply.
Despite the sharp fall in generation, the Nigerian Independent System Operator rejected claims that the national grid had suffered a system-wide collapse.
A senior official of the operator, speaking anonymously to journalists, maintained that no nationwide disturbance had been established and suggested that some of the reported outages could have resulted from localised technical problems.
The official explained that equipment tripping and other temporary faults could interrupt electricity supply without necessarily constituting a complete collapse of the national grid.
NISO also directed its technical personnel to examine the system and identify any abnormalities that might explain the reported disruptions.
The operator's position introduced an important distinction between a sharp reduction in electricity generation and a formally confirmed national grid collapse. Although the generation figures demonstrated a substantial loss of available power, the precise technical cause had not been established in the information released at the time.
Further figures reported from the grid dashboard showed that generation had increased to approximately 653.60MW by 2 p.m., indicating a limited recovery from the earlier reading.
However, 27 of the 33 generating plants listed on the dashboard were still recording zero output at that time. Only six plants were contributing electricity, including Delta, Odukpani NIPP, Omotosho, Omotosho NIPP, Sapele and Trans-Amadi.
The 2 p.m. figures showed Delta generating 196MW, Odukpani NIPP contributing 187.90MW and Omotosho recording 157.50MW. Omotosho NIPP supplied 84.30MW, while Sapele and Trans-Amadi contributed 25.10MW and 2.80MW respectively.
Although the figures indicated some improvement, electricity generation remained far below the level recorded earlier in the morning.
The latest disruption comes amid continuing concerns about the reliability of Nigeria's electricity infrastructure, particularly the ability of the national grid to maintain stable supply when generating stations or transmission facilities experience technical difficulties.
The Federal Government recently approved plans to develop separate eastern and western electricity grids as part of a broader effort to strengthen the country's power infrastructure and reduce the consequences of recurring system disturbances.
The proposed projects are intended to improve the resilience of electricity transmission and reduce dependence on the existing interconnected network. However, the plans remain under development and do not provide an immediate solution to Monday's disruption.
For electricity consumers, the most immediate consequence of the sharp decline was a reduction in available power, with distribution companies unable to supply customers at their usual allocation levels.
As of the latest figures reviewed, NISO had not publicly established the precise cause of the generation decline or announced a definitive timetable for restoring output to its earlier level.
The incident has renewed attention on the reliability of the country's electricity network, with the operator's technical findings expected to clarify the circumstances surrounding the disruption.
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