The Transmission Company of Nigeria (TCN) has declared a force majeure on the Ikeja West–Osogbo 330kV transmission line after a severe rainstorm knocked down a critical tower, disrupting a major electricity corridor in the South-West.
Force majeure refers to an unforeseen event beyond one’s control, such as a natural disaster or storm, that prevents an organisation from fulfilling its contractual or operational obligations.
The incident, which occurred on April 16, 2026, affected one of the major transmission routes responsible for evacuating bulk electricity across parts of the South-West region.
TCN disclosed the development in a statement issued on Sunday by its General Manager, Public Affairs, Ndidi Mbah.
According to the company, the transmission line tripped during the storm after a fault was detected along the route.
“The Transmission Company of Nigeria wishes to inform the public that a force majeure has occurred on the Ikeja West–Osogbo 330kV transmission line following a severe rainstorm on Thursday, 16 April 2026,” the statement said.
The company explained that the fault was traced to a section located about 14.9 kilometres from the Ikeja West (Ayobo) end of the line.
It added that a detailed inspection by maintenance crews revealed that one of the towers along the corridor had collapsed.
“Further inspection by TCN maintenance crews revealed that Tower No. 515 had collapsed during the storm, with the structure giving way at its midsection,” the company stated.
TCN said it had begun mobilising materials and personnel to the site to commence repairs and restore full transmission capacity.
“While TCN is mobilising materials and personnel for the re-erection of the fallen tower, efforts are currently ongoing by its engineers to dismantle the affected tower,” the statement added.
The Ikeja West–Osogbo 330kV line is considered a strategic backbone of Nigeria’s national grid, linking the Ikeja West substation in Lagos to other parts of the South-West and beyond.
Any disruption along the corridor can significantly affect electricity supply, particularly in densely populated areas such as Lagos and neighbouring states.
TCN said emergency response measures had already been activated to minimise the impact of the disruption.
“We assure that we will work assiduously to restore flexibility and redundancy in that corridor as an alternative line is still in service evacuating bulk power. Updates will be provided as work progresses,” the company said.
By declaring force majeure, the transmission company formally indicated that the disruption was caused by circumstances beyond its control, in this case extreme weather conditions.
Such declarations are not uncommon in Nigeria’s power sector, particularly during periods of intense rainfall and storms that can weaken ageing infrastructure.
Nigeria’s transmission network has long faced challenges including limited capacity, ageing equipment, and weather-related disruptions, despite ongoing upgrade efforts.
The national grid, managed by TCN, evacuates electricity generated by power generation companies to distribution companies nationwide. However, frequent system disturbances and line trips continue to hinder stable electricity supply.
Industry stakeholders have repeatedly raised concerns about the resilience of the country’s transmission infrastructure, especially as climate variability increases the frequency of severe weather events.
The Ikeja West substation, one of the largest electricity hubs in the country, plays a critical role in supplying power to Lagos and surrounding areas, making any fault along its connected lines particularly significant for households and industries.
