Parts of Lagos and Osun states have been plunged into blackouts following separate disruptions to electricity infrastructure.

The outages were caused by the failure of two major transmission lines, which reduced power supply to Lagos, and flooding that damaged electricity distribution facilities in parts of Osun.

The Eko Electricity Distribution Company said on Sunday that power allocation to its network had dropped after the Oshogbo–Ikeja 330kV and Benin–Egbin 330kV transmission lines went out of service. The development has forced the company to implement load shedding across several of its business districts.

The DisCo said, “Some business units may experience loadshedding. Cause: Grid Disruption.

“Osogbo/Ikeja 330kV line down. The Benin/Egbin 330kV line is down. Impact: Reduction in grid allocation.”

The Eko Electricity Distribution Company assured customers that it is working closely with the national grid operator to restore normal power supply as soon as the affected transmission lines are returned to service.

“We are in constant contact with the national grid operator and will restore supply as soon as the lines are back. Thank you for your patience,” it stated.

The DisCo did not specify when the affected transmission lines would be restored but said it was working with the relevant authorities to normalise electricity supply as quickly as possible.

The latest transmission line failures occurred barely a week after the Transmission Company of Nigeria declared force majeure on its Oworonshoki 132/33kV and Lekki 330/132kV transmission substations following severe flooding at the facilities.

The flooding has continued to disrupt electricity supply across several parts of Lagos, with the Eko Electricity Distribution Company previously warning that full restoration would depend on the recovery and availability of the affected transmission infrastructure.

The affected areas include Chevy View Estate, Chevron Drive, Agungi, Alpha Beach, Ikate, the Elegushi area, Carlton Gate, Kusenla, Victory Park Estate, Oniru, Maroko, Muri Okunola, Ajose Adeogun, Ligali Ayorinde and parts of Aboyade Cole.

Also affected are Morinho Drive, Landmark Road, Igbo Efon, the Lekki Tollgate 2 area, Igbokusu, Gbangbala, Platinum Way, Jakande/Coastal Road, the OADC/Mayegun area, Ajiran and its environs, the Chevron Alternative area, and Osapa London.

Meanwhile, the Ibadan Electricity Distribution Company said electricity supply to several communities in Osun State was disrupted after flooding caused by a heavy windstorm inundated the Ilerin Injection Substation.

The DisCo said the flooding affected the Isare 11kV, Irogbo 11kV and Mount Carmel 11kV feeders, leaving communities including Ifewara, Iwara, Bolorunduro, Irogbo, Ayeso, Odo-Oro, Wesley, Express Area, Ilerin, Irojo, Olomilagbala, Iwikun, Isare and surrounding areas without electricity.