Can technology and urban greening cool Sierra Leone’s scorching heat?
Feb 14, 2025
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Tommy Charles, the team lead of the Sierra Leone Open Mapping Initiative, discusses the rising temperatures in Freetown and its harsh impacts on daily life. He shares insights from a recent Urban Heat Hackathon, where technology and urban greening emerged as key solutions. With the help of mapping technology, they are identifying hot spots and advocating for community engagement. The conversation highlights innovative strategies like tree planting and the use of satellite imagery to combat extreme heat in crowded areas.
The extreme heat in Freetown significantly impacts residents' health and livelihoods, necessitating innovative solutions for adaptation and mitigation.
Innovative projects from the recent Urban Heat Hackathon highlight the importance of geospatial mapping and urban greening in tackling climate challenges.
Deep dives
Extreme Heat Challenges in Freetown
Freetown, the capital of Sierra Leone, faces severe issues with extreme heat, with temperatures soaring past 35 degrees Celsius. This extreme weather not only affects comfort but also leads to an increase in health risks and hampers the livelihoods of residents, particularly in crowded neighborhoods and open-air markets. For example, the intense heat can cause food to spoil more quickly, leading to financial losses for vendors and contributing to food scarcity. The community's reliance on inadequate housing materials, such as corrugated zinc, exacerbates the situation, pushing individuals outside where they struggle against the sweltering heat.
Innovative Solutions from Urban Heat Hackathon
A recent urban heat hackathon in Freetown showcased innovative responses to the heat crisis, resulting in two notable projects. One project, led by Tommy Charles, employed mapping technology to identify the city's hottest areas, using satellite imagery to create detailed heat maps. Another initiative, led by Glory Aminata-Ture, focused on urban greening efforts, including the planting of micro forests and vertical gardens to naturally cool the environment. These projects emphasize the need for tailored solutions that take into account the community's unique topography and heat distribution patterns, rather than a one-size-fits-all approach.
Barriers to Implementing Geospatial Solutions
Despite the promising developments, both Tommy and Glory face challenges in promoting the use of geospatial information for addressing extreme heat in Freetown. A significant hurdle is raising awareness about the importance of this data to facilitate effective environmental solutions, as many individuals are unaware of how climate change directly impacts their lives. Additionally, securing funding for these initiatives can be difficult, compounded by a lack of political will and initial resistance from the community. However, progress has been made, and increasing understanding of climate change may lead to better support for innovative and sustainable solutions.
Freetown, the capital of Sierra Leone, is experiencing rising temperatures, with extreme heat becoming a major challenge for residents, especially those in crowded neighbourhoods and open-air markets.
With limited access to cooling infrastructure, the heat affects daily life, health, food security and the economy.
In response, the city recently hosted an ‘Urban Heat Hackathon’, where teams developed innovative solutions to tackle the problem.
In today's Africa Daily Alan Kasujja speaks to two of the hackathon winners, Tommy Charles and Glory Aminata Turay, to explore how technology and urban greening are helping residents adapt to and mitigate extreme heat.
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