The word Ghanaians use for their country's power outages is dumsor -- literally, "off and on." It became so common in daily life that it entered the national vocabulary as a single concept, the way English speakers say "rush hour" without thinking about its parts. What most people do not realize is that dumsor is, in part, a climate story. Because roughly a third of Ghana's electricity comes from hydropower -- primarily from the Akosombo Dam on the Volta River -- every unpredictable dry season becomes a potential blackout. And the dry seasons are getting less predictable.
Lake Volta is the largest artificial lake by surface area in the world, stretching 400 kilometres across eastern Ghana. When the Akosombo Dam was completed in 1965, it flooded an area the size of Lebanon. The lake altered rainfall patterns across Ghana -- a body of water that large generates its own microclimate, shifting moisture and wind in ways that scientists are still measuring. But the larger atmospheric shifts now dwarf the lake's local effects. Since 1960, Ghana has warmed by 1.0 degrees Celsius, with the drier northern regions heating faster than the coast. The Volta Basin, which supplies the lake and the dam, faces projected water reductions of 24 percent by 2050 and 45 percent by 2100. A country that built its electrical grid around a single massive reservoir is discovering what happens when the reservoir's source becomes unreliable.
Along Ghana's 550-kilometre coastline, the sea is rising at 2.1 millimetres per year. That sounds modest until you calculate the cumulative effect: projections indicate a 16.5-centimetre rise by 2050 and 34.5 centimetres by 2080. Between 2005 and 2017, roughly 37 percent of Ghana's coastal land was lost to erosion and flooding. Approximately 45,000 Ghanaians are affected by flooding every year, and half the coastline is now considered vulnerable. In the Volta Delta, land subsidence compounds the problem -- some areas are sinking at rates of up to 9.2 millimetres per year, meaning the sea and the land are moving toward each other simultaneously. By 2100, up to 45 percent of the delta could fall below local sea level.
Seafood accounts for 40 to 60 percent of protein intake in Ghana. Along the coast, fishing is not merely an industry but a way of life that structures communities, markets, and family roles. Climate change threatens to reduce possible fish catches by 25 percent or more by 2050, a blow that would ripple through diets, livelihoods, and markets far inland. A 2024 World Bank report estimates that about two million Ghanaians are already vulnerable to food insecurity. In communities like James Town and Agbogbloshie in Accra, where flooding is routine and incomes are low, residents face regular cholera outbreaks, diarrheal disease, and the compounding stress of heat and air pollution. Children under five are particularly exposed -- their immune systems still developing in environments where the climate is actively worsening the conditions around them.
Ghana signed the Paris Agreement on April 22, 2016, and ratified it that September. The country has committed to net-zero emissions by 2060 and pledged 34 strategies to cut greenhouse gas output, aiming to reduce emissions by 64 million metric tons of CO2 equivalent by 2030. Nine of those strategies Ghana can implement independently; the other 25 depend on international funding and technical support. The gap between ambition and capacity is the story of climate adaptation in much of West Africa. Ghana published its first national climate change adaptation strategy in 2012, followed by a policy framework from the Ministry of Environment, Science, Technology and Innovation in 2013. The frameworks exist. The question is whether they can move fast enough to outpace a coastline that is already dissolving, a power grid that already flickers, and a fishing fleet that is already coming home with less.
Coordinates centered at 7.60N, 1.02W, roughly at the geographic center of Ghana. From altitude, Lake Volta dominates the eastern landscape -- its vast, branching shape is unmistakable as the world's largest artificial lake by surface area. The southern coastline near Accra (DGAA, Kotoka International Airport) shows visible signs of coastal erosion and development. The Volta Delta at the eastern coast is the area most threatened by sea level rise. The contrast between the green southern coast and the drier northern savanna is visible from cruising altitude in clear weather.