Flood Risks Force Preventive Shutdown of Key Power Substations

 

Heavy flooding in parts of the Greater Accra Region has forced the temporary shutdown of two major electricity substations, disrupting power supply and exposing the growing vulnerability of Ghana’s power infrastructure to extreme weather events.

The Ghana Grid Company Limited (GRIDCo) and the Electricity Company of Ghana (ECG) announced on Monday that the Mallam and Achimota primary substations had been switched off as a precaution after floodwaters inundated critical electricity infrastructure.

The shutdown affects electricity transmission and distribution in sections of Accra and comes as torrential rains continue to batter parts of the capital, causing widespread flooding.

According to the two power utilities, the decision was taken to safeguard lives, protect expensive electrical equipment and prevent further damage to the national power network.

“The precautionary shutdown became necessary because the flooding has affected critical power infrastructure at a number of substations, posing significant risks to both electrical equipment and operational personnel,” the joint statement said.

Businesses Face Disruptions

The interruption is expected to affect thousands of homes and businesses in some of Accra’s busiest commercial districts.

For manufacturers, retailers, financial institutions, hospitality businesses and small enterprises, prolonged outages could translate into higher operating costs as firms increasingly rely on backup generators to maintain operations.

The disruption also underscores the broader economic risks posed by climate-related events to critical infrastructure. Electricity remains central to commercial activity, digital services, healthcare, telecommunications and industrial production, making network resilience increasingly important as weather patterns become more unpredictable.

More Outages Possible

GRIDCo and ECG cautioned that additional power interruptions could occur if flooding spreads to other electricity installations.

The utilities said they are continuously monitoring the situation and assessing the impact on both the transmission and distribution networks.

“As the heavy rains and flooding persist, the public is advised that power supply may be temporarily interrupted in other affected areas, where necessary, as a precautionary measure to protect lives, property, and critical electricity infrastructure,” the statement noted.

Safety Advisory

The utilities urged residents to avoid electrical hazards during the flooding by reporting fallen electricity poles, exposed power lines, flooded electrical installations and other dangerous situations to the nearest ECG office or through the company’s customer service channels.

They apologised for the inconvenience and assured customers that restoration efforts would begin once weather conditions improve and engineers determine that it is safe to re-energise the affected substations.

Bigger Questions for Ghana’s Energy Infrastructure

Beyond the immediate outages, the incident raises broader questions about the resilience of Ghana’s electricity network as climate-related weather events become more frequent.

The country has invested heavily in expanding electricity generation and transmission over the past two decades. However, the increasing occurrence of flash floods, particularly in urban centres such as Accra, is exposing vulnerabilities in critical infrastructure that were not designed for today’s climate realities.

For businesses, repeated weather-related power disruptions translate into lost productivity, higher operating costs and increased dependence on backup power systems. For the utilities, they point to the growing need for investments in flood-resilient substations, improved drainage systems, elevated electrical installations and climate-proof infrastructure planning.

The shutdown of the Mallam and Achimota substations therefore serves as more than a temporary operational response. It highlights the need to make climate resilience a central pillar of Ghana’s energy strategy if the country is to safeguard electricity supply and support long-term economic growth.