Sierra Leone’s Rising Heat: A Climate Crisis

By Abdul Rahman Bah

Sierra Leone is confronting an increasingly serious climate challenge as rising temperatures, prolonged heat and changing rainfall patterns threaten public health, agricultural production, water resources and economic development. What many citizens regard as ordinary hot weather is increasingly becoming a national concern that demands urgent government intervention, stronger environmental protection and effective climate adaptation policies.

Although Sierra Leone has traditionally experienced a tropical climate, the growing concern is the increasing intensity and frequency of hot conditions. High humidity, poverty, inadequate housing, limited access to electricity and unreliable water supplies make extreme heat particularly dangerous for vulnerable communities.

According to the International Monetary Fund’s (IMF) 2026 climate assessment, Sierra Leone’s average temperature has increased by approximately 1°C over the past 60 years, rising from a historical average of 26°C to around 27°C. The assessment further indicates that annual heat days increased from approximately 30 in 2005 to more than 40 in 2025.

More alarming, the IMF projects that days exceeding 35°C could surpass 45 annually by 2050. These figures demonstrate that rising temperatures are not simply temporary weather conditions but part of a longer-term climate change challenge.

The World Bank’s Climate Change Knowledge Portal provides additional evidence of the country’s warming trend, estimating an average temperature increase of approximately 0.13°C per decade since 1970. Under a high-emissions scenario, Sierra Leone could experience substantially higher temperatures by the middle and end of this century.

One of the most immediate consequences of extreme heat is its impact on human health. Prolonged exposure to high temperatures can cause dehydration, heat exhaustion, heatstroke and cardiovascular complications. Children, elderly people, pregnant women and individuals with existing health vulnerabilities face particularly serious risks.

In Freetown, market women, commercial motorbike riders, construction workers, street traders and sanitation workers spend several hours outdoors, often without adequate shade, drinking water or resting facilities.

For poorer households, the situation is even more difficult. Many families cannot afford air conditioners or electric fans, while unreliable electricity makes cooling facilities inaccessible to thousands of residents.

The Ministry of Health must therefore strengthen the monitoring and reporting of heat-related illnesses. Hospitals and community health centres should have appropriate arrangements for recognising and treating heat exhaustion and heatstroke. Without reliable health data, authorities will struggle to understand the true scale of the problem.

Agriculture is another sector facing increasing climate pressure. According to the IMF’s 2026 assessment, agriculture accounts for approximately 50 per cent of employment and 30 per cent of economic value added in Sierra Leone.

The country’s dependence on rain-fed agriculture makes farmers particularly vulnerable to changing rainfall patterns, prolonged dry periods and increasing temperatures. Higher temperatures can increase evaporation, reduce soil moisture and affect crop development.

Rice, cassava and other essential food crops are exposed to these changing conditions. The World Bank’s climate assessment warns that climate change could contribute to agricultural GDP losses of approximately 3–5 per cent by 2050.

This presents a serious challenge for the government’s Feed Salone programme, which aims to increase domestic food production and reduce dependence on imported food.

Government must invest more in irrigation systems, improved seeds, agricultural research, climate-resilient farming methods and reliable weather information. Without these interventions, rising temperatures could undermine agricultural productivity and deepen household food insecurity.

Freetown is particularly vulnerable because rapid urbanisation, deforestation, uncontrolled construction and the destruction of green spaces are increasing environmental pressure.

Trees provide natural shade and help regulate surrounding temperatures. However, when vegetation is destroyed and replaced with buildings, concrete surfaces and paved roads, neighbourhoods can become hotter. This phenomenon is commonly known as the urban heat-island effect.

The IMF’s 2024 Climate Policy Diagnostic identifies deforestation, rapid urbanisation and pressure on water resources as significant environmental challenges in Sierra Leone.

The destruction of forests around the Western Area Peninsula is therefore not simply an environmental issue. It threatens natural cooling systems, biodiversity and the country’s water resources.

Government must strengthen forest protection, regulate construction in environmentally sensitive areas and expand urban tree planting. Freetown City Council and environmental authorities must demonstrate that their environmental policies are producing measurable results.

The financial consequences of climate change could be enormous. According to the World Bank’s 2026 assessment, Sierra Leone’s GDP could be 9–10 per cent lower by 2050 relative to its 2025 baseline under the climate scenarios examined. Poverty could also increase by 2–7 percentage points, depending on the scenario.

These projections reflect broader climate-related economic damage, including agricultural losses and declining labour productivity, rather than heat alone.

For a country already struggling with poverty, unemployment and food affordability, such projections should be treated as a serious economic warning.

Outdoor workers are particularly vulnerable because extreme temperatures can reduce working hours, physical performance and productivity. This could affect household incomes and economic activities across the country.

Sierra Leone has made international commitments through its updated Nationally Determined Contribution (NDC 3.0), covering the period 2025–2035. The commitments address agriculture, forestry, energy, transport, waste management and sustainable land use.

However, the major challenge remains implementation. Climate policies and international commitments will have little impact if they are not supported by adequate funding, institutional coordination and transparent monitoring.

The Ministry of Environment and Climate Change, Environmental Protection Agency, Sierra Leone Meteorological Agency and Ministry of Health must strengthen cooperation.

The Meteorological Agency should improve temperature monitoring and issue accessible public heat warnings. Health authorities should strengthen heat-related disease surveillance, while agricultural institutions should provide farmers with reliable climate information.

Parliament must also exercise its oversight responsibilities by demanding reports on climate expenditure, adaptation programmes and the management of international climate financing.

Climate funding should translate into practical benefits for ordinary citizens, including protected forests, reliable water supplies, improved agricultural support and stronger healthcare services.

Sierra Leone must stop treating rising temperatures as an ordinary seasonal inconvenience. The scientific evidence indicates a long-term warming trend, while future projections point towards increasingly serious risks.

Government should establish a coordinated national heat action strategy, protect natural forests, expand urban green spaces, improve access to drinking water and strengthen climate-resilient infrastructure.

Schools, hospitals, markets and workplaces must also introduce practical measures to protect people during periods of extreme heat.

Ultimately, climate resilience must become a measurable national development priority rather than remain confined to international conferences and policy documents.

Sierra Leone cannot afford to wait until rising temperatures deepen poverty, threaten food production and overwhelm vulnerable communities.

The heat is rising, the scientific warnings are clear, and the responsibility to protect citizens rests with those entrusted with governing the country.