The Nigerian Meteorological Agency (NiMet) has warned residents and authorities in 13 states to prepare for possible flash floods between August 11 and 20, 2026, as heavy rainfall continues across parts of the country.

The states identified in the latest warning include Sokoto, Kaduna and Adamawa, alongside 10 other states considered vulnerable to flash flooding during the period.

The warning comes as Nigeria moves deeper into the peak of the rainy season, with intense rainfall increasing the risk of flooding in low-lying communities, urban areas and locations with inadequate drainage.

NiMet’s latest advisory highlights the importance of early preparation, particularly in communities that have experienced flooding in previous years.

Homes and infrastructure at risk

Flooding remains a major concern for Nigeria’s built environment because intense rainfall can quickly overwhelm drainage systems and expose homes, roads and other infrastructure to damage.

Poor drainage, blocked waterways and development in flood-prone areas can increase the impact of heavy rainfall.

For residents in vulnerable communities, the latest warning reinforces the need for local authorities and emergency agencies to monitor areas where flooding could threaten homes and public infrastructure.

NiMet urges preparedness

NiMet has advised residents to continue monitoring official weather forecasts and flood advisories as conditions develop.

The agency also stressed the importance of keeping drains and waterways free of refuse, while cautioning people to avoid flooded roads and other areas where floodwater poses a safety risk.

The warning also has implications for motorists and commuters, as flooding can disrupt road networks, cause traffic congestion and make some routes temporarily inaccessible.

Heavy rainfall can also affect electricity and telecommunications infrastructure and create additional pressure on already vulnerable public facilities.

Urban planning remains critical

The latest warning again puts the spotlight on the relationship between urban planning and flood management.

Nigeria’s rapid urbanisation has increased pressure on available land, while development in flood-prone locations and inadequate drainage infrastructure can worsen the consequences of extreme rainfall.

A July NiMet advisory similarly identified numerous states, including Sokoto, Kaduna and Adamawa, among areas vulnerable to flash flooding during periods of intensified rainfall.

The repeated warnings underline the need for authorities to move beyond emergency response and strengthen long-term flood prevention through better drainage, effective land-use planning and protection of natural waterways.

For the housing sector, this is particularly important. Expanding housing supply without considering flood risk could expose more households to property damage and displacement.

As the August 11–20 risk period continues, residents and authorities in the affected states will need to take the warning seriously and strengthen preparedness measures.

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The Federal Ministry of Environment has warned that 26 states and the Federal Capital Territory (FCT) may experience flooding between June 22 and July 5, 2026, following forecasts of heavy rainfall across several parts of the country.

The warning was issued on Monday through the National Flood Early Warning Centre under the ministry’s Erosion, Flood and Coastal Zone Management Department.

FG Identifies High-Risk and Critical Flood Zones

According to the advisory dated June 22, 2026, several communities across the country have been classified as either critical-risk or high-risk flood zones.

States listed under the critical-risk category include Abia, Adamawa, Akwa Ibom, Anambra, Bayelsa, Benue, Cross River, Delta, Ebonyi, Edo, Ekiti, Enugu, Imo, Kogi, Kwara, Lagos, Niger, Ogun, Ondo, Osun, Oyo and Rivers.

Lagos, Rivers, Anambra, FCT Among Most Vulnerable Areas

The ministry identified numerous flood-prone communities likely to be affected by heavy rainfall and rising water levels.

In Lagos State, vulnerable areas include Agege, Alimosho, Apapa, Badagry, Ikeja, Ikorodu, Lagos Island, Lekki and Surulere.

In the FCT, high-risk areas include Abuja Municipal, Gwagwalada, Kubwa, Nyanya and Wuse.

Other identified locations include Onitsha and Awka (Anambra), Yenagoa (Bayelsa), Makurdi (Benue), Calabar (Cross River), Warri and Sapele (Delta), Enugu and Nsukka (Enugu), Owerri (Imo), Lokoja (Kogi), Ilorin (Kwara), and Port Harcourt (Rivers).

FG Issues Safety Advisory to Residents

The ministry urged residents in high-risk communities to take urgent precautionary measures to reduce potential impact.

It advised communities in critical zones to maintain flood watch, identify evacuation routes, and avoid building or trading in flood-prone areas.

“Communities classified as Critical should maintain immediate flood watch, identify evacuation routes, protect vulnerable households,” the advisory stated.

For high-risk areas, the ministry called for intensified drainage clearance, monitoring of waterways, and improved community reporting of rising water levels.

Rising Concern Over Seasonal Flooding

The warning comes amid the peak of Nigeria’s rainy season, raising concerns over possible displacement of residents, destruction of property, and disruption of economic activities in vulnerable areas.

Authorities have urged state governments and emergency agencies to step up preparedness measures to prevent avoidable losses.

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Global real estate markets are exposed to climate-related risks that are largely ignored in property valuation and investment decisions, according to Oluwaseun Ajayi, a real estate economist and climate-risk scholar.

Ajayi, winner of the 2025 Emeritus Professor Sarah Sayce Award for Sustainability Research in the United Kingdom, said property markets continue to rely on outdated valuation models that fail to account for long-term climate threats such as flooding, heat stress, and sea-level rise.

He explained that most property valuations focus on historical sales data and current rental income, even though climate change presents risks that build gradually and can cause sudden asset losses.

“Until climate risk is properly priced, it will continue to be ignored,” Ajayi said.

Hidden risks in global property markets

Ajayi’s award-winning research, titled Pricing the Unseen, examined how climate risk is underestimated even in countries with advanced infrastructure and planning systems.

Using the UK’s Thames Estuary 2100 Plan, a major flood protection programme, his study found that property markets still fail to fully reflect long-term flood risks. According to his findings, some real estate portfolios could face hidden losses of up to 25 percent over time if climate risk is eventually priced correctly.

He described this as a financial risk, not just an environmental concern.

Why Lagos and Nigeria should be concerned

Ajayi said the implications are even more serious for Nigeria, particularly Lagos, where flooding has become a frequent occurrence in areas such as Lekki, Victoria Island, Ikoyi, Ajah, and parts of Badagry.

Despite major interventions like Eko Atlantic and the Lagos State Climate Action Plan, climate risk is not formally integrated into property valuation standards, mortgage lending, or insurance pricing.

According to Ajayi, delayed recognition of these risks could lead to sudden market corrections, loss of property value, and wider economic disruption.

What government should do

Ajayi recommended three immediate steps for Lagos State:

Introduce climate-adjusted property valuation, where flood risk, heat exposure, and infrastructure reliability are treated as measurable financial factors.

Treat adaptation infrastructure as a long-term financial commitment, supported by clear regulations, delivery timelines, and planning controls.

Create a Lagos Climate Risk Map, linked directly to property taxes, mortgage approvals, and insurance pricing.

He said these measures would improve market stability and investor confidence rather than discourage investment.

Investors and climate risk pricing

Responding to concerns that climate risk pricing could scare investors, Ajayi said investors are more concerned about unexpected losses than transparent risk assessments.

“Markets collapse when risk is hidden and suddenly revealed. Transparent pricing creates stability,” he said.

Can Africa adopt climate-risk tools?

Ajayi said African institutions can adopt advanced tools such as Climate Value-at-Risk and machine learning faster than expected. He noted that Nigeria already has access to key data sources, including satellite climate data and property transaction records.

The main challenge, he said, is coordination among government agencies, financial institutions, universities, and professional bodies.

Looking ahead

Ajayi said the award strengthens his focus on policy advisory work, capacity building, and applied research aimed at helping governments and investors make informed decisions.

He encouraged young African professionals to focus on producing practical, policy-relevant work that addresses real economic challenges.

The post Opinion- Real estate markets globally are sitting on climate risk they cannot see – Oluwaseun Ajayi appeared first on Housing TV Africa.

The Federal Ministry of Environment has issued a major flood alert covering 15 states and 69 communities, warning of heavy rainfall between September 24 and 28 that could trigger dangerous flooding.

The warning was issued by the Ministry’s National Flood Early Warning Centre and signed by Usman Abdullahi Bokani, Director of the Erosion, Flood, and Coastal Zone Management Department.

“This advisory is part of our routine early warning system to prevent loss of lives and property during the peak rainy season,” the Centre said.

The affected states include Adamawa, Anambra, Bayelsa, Borno, Delta, Edo, Imo, Kano, Katsina, Ondo, Oyo, Rivers, Sokoto, Taraba and Zamfara, with specific flood-prone communities such as Jimeta, Yenagoa, Asaba, Warri, Benin City, Kano, Iseyin, Ahoada and Gusau flagged for heightened risk.

Flooding remains one of Nigeria’s most devastating annual disasters. According to the National Emergency Management Agency (NEMA), as of September 20, at least 232 people have died, 121,224 displaced, and more than 339,000 affected nationwide by floods this year.

The Ministry has urged state governments, local authorities, and residents in high-risk areas to prepare by clearing drainage systems, providing temporary shelters, and disseminating safety information.

“With the rainy season in full swing, community awareness and preparedness are crucial,” the Ministry warned. “Everyone must remain vigilant and ready to respond to emergencies.”

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