Bold Citizen Science Initiative Tackles Climate Change in Tshwane

In the wake of a striking Greenpeace report highlighting South Africa's rapidly escalating annual temperatures, volunteers in Tshwane have embarked on a groundbreaking heat mapping initiative. Armed with technology and a determination to foster change, these citizen scientists are gathering essential data that could pave the way for a more climate-resilient future.

Led by members of Planact, an environmental NGO, about 16 volunteers traversed numerous communities within the City of Tshwane – from the bustling Pretoria city centre to the residential sprawls of Arcadia and Mamelodi. Each volunteer was chosen to become part of a collective frontline against the phenomenon of urban heat islands and rampant temperature rise – a local fight in the global battle against climate change.

These volunteers, dubbed local citizen scientists, have been trained to utilize state-of-the-art temperature monitoring sensor equipment, inclusive of heat sensors and camera adaptors for FLIR (infrared) thermal imaging. This enabled the capture of precise and reliable temperature data.

Tazmin Hudson, Planact project Manager, has voiced that the data collated by these citizen scientists will assist the City of Tshwane in understanding complex heat dynamics across the metropolis, and is vital in formulating early warning systems, urban greening strategies, roofing programmes, and the creation of new by-laws tailored to mitigate the adversities brought on by climate change.

With an emphasis on certain wards like Mamelodi and Mamelodi East, Planact expects to recognize the hottest areas after the data's analysis, predicted to take approximately three weeks. Thereafter, an informative heat map will be developed, distinguishing various hotspots within Tshwane where sustainable interventions like tree planting, cool roofing, and reflective paving could make substantial differences to the warmth experienced by inhabitants.

The approach undertaken by these selfless volunteers was witnessed firsthand by journalists at GroundUp, who tracked the volunteers during their critical data-capturing efforts. Community facilitator Noluthando Geja, a resident of Itireleng informal settlement, called attention to the plight of those living in tin structures, confronting the wrath of climate change in the form of intolerable heat.

Such insights provided by locals like Geja are indispensable, reinforcing the need for innovation in municipal services that cater to the extremes of weather, especially for vulnerable communities.

Executives like Lutske Newton, the director of climate change adaptation and resilience in the City of Tshwane, and Nerali Patel, an urban planning expert at the World Bank, echo this sentiment by expressing the importance of greenspace in urban heat reduction. Moreover, the World Bank's engagement follows a study alerting that cities like Johannesburg and Ekurhuleni might encounter a significant increase in hot nights annually by 2050.

Support from the National Treasury, the Swiss Secretariat for Economic Affairs, and additional donors has been directed towards identifying marginalized communities in dire need of green spaces, thereby contributing to a more equitable environmental future.

The Tshwane heat mapping project doesn't stand alone as a local endeavor but represents a scalable, influential model for other metropolitan municipalities, embodying the essence of community-led climate action with far-reaching implications.