Ogun issues fresh flood warning ahead of September rains

Ogun State has issued a fresh warning to residents in vulnerable communities before the second phase of the 2026 rainy season, with September rainfall forecast to average about 360 millimetres.

Environment Commissioner Ola Oresanya said the state’s first rainy-season phase, from mid-March to July, brought intense rain and isolated flash floods, but the impact remained comparatively limited. He attributed that outcome to public awareness campaigns, maintenance of rivers and drainage channels, and improvements in waste management.

The new warning focuses on the combined risk from prolonged rainfall, controlled overflow from Oyan Dam and tidal fluctuations that could slow the flow of the Ogun River. Oresanya said these conditions could temporarily saturate wetlands and floodplains and increase flooding risks.

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The period could bring river and coastal flooding to some parts of the state due to prolonged rainfall, controlled overflow from Oyan Dam and tidal fluctuations, which could impede the flow velocity of the Ogun River.

Residents in Isheri, Arepo, Mawere, Magboro, Akute, Warewa and parts of Abeokuta were advised to remain vigilant and move to safer locations where necessary. The advisory also covered coastal communities in Ogun Waterside, Ijebu East and Ipokia, as well as communities along the floodplains of the Ilo and Iju rivers.

The commissioner urged fish farmers in floodplains and river corridors to harvest their stocks promptly to limit possible losses. Specific areas named included Eriwe, Yemule, Ilase and Ayegbami. He also said major waterways receiving attention included Sokori River and its tributaries, Opa-Aro, Adiyan, Eruwuru, Yemule, Gbogidi Canal and Ijamido rivers and streams.

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We therefore advised residents in Isheri, Arepo, Mawere, Magboro, Akute and Warewa, as well as parts of Abeokuta, to remain vigilant and relocate to safer locations where necessary.