The Nigerian Meteorological Agency has issued a flash flood risk alert for July 1–10 across Lagos State and 26 other states.
In the advisory, NiMet attributed the heightened risk to the persistent rainfall experienced in June.
It warned that further widespread rainfall expected during the period could trigger flooding as soils across much of the country are unable to absorb additional precipitation.
“Following widespread rainfall recorded across many parts of Nigeria in June, soils have become heavily saturated, reducing their ability to absorb additional rainfall.
“As July marks the beginning of the peak rainy season, the risk of flash flooding is expected to increase, particularly in low-lying, urban, coastal, and poorly drained areas,” the Sunday statement read.
According to the agency, states likely to experience flash flooding during the period include “Taraba, Sokoto, Borno, Zamfara, Kebbi, Katsina, Kaduna, Nasarawa, Plateau, Adamawa, Kwara, Kogi, Oyo, Ogun, Lagos, Osun, Ekiti, Delta, Edo, Abia, Imo, Anambra, Enugu, Akwa Ibom, Cross River, Rivers, and Bayelsa.”
The agency also cautioned that “temporary power and telecommunications outages may occur in affected areas, while poor visibility during intense rainfall could pose risks to motorists and aviation operations.”
The forecast further highlighted the potential for waterlogging of farmlands, with possible crop losses, as well as damage to roads, bridges, drainage infrastructure, and other public facilities.
It warned that the anticipated heavy rainfall could have far-reaching consequences for transportation, public utilities, agriculture, infrastructure, and public health.
The weather agency asserted that the heavy rainfall could “trigger localized flooding, resulting in traffic gridlock, road closures and disruptions to transportation.”
Health officials were also urged to remain vigilant over the increased risk of waterborne diseases associated with stagnant floodwaters and poor sanitation.
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To minimise the impact of the expected flooding, NiMet urged residents and emergency responders to take preventive measures without delay.
NiMet also called on emergency management authorities to step up preparedness efforts.
It stated, “SEMAs, NEMA, community leaders, and relevant stakeholders should strengthen preparedness and response measures.”
The agency stressed that proactive planning remains the most effective way to reduce the devastating effects of flash flooding.
“Early preparedness and timely action remain essential in reducing the impacts of flash flooding,” it added.
The agency advised Nigerians to: “Follow weather forecasts and flash flood advisories issued by NiMet; keep drains, gutters, and waterways free of refuse to ensure the free flow of water.
“Also, it said it should secure loose outdoor objects and reinforce vulnerable structures; and avoid walking or driving through floodwaters.”
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