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Victoria Falls, nestled in the Zambezi Valley of Matabeleland North, Zimbabwe, occupies a truly remarkable geographic position. The town’s very existence is defined by the Mosi-oa-Tunya, the ‘Smoke that Thunders,’ – the iconic Victoria Falls – where the Zambezi River dramatically plunges over a basalt cliff, creating a perpetual mist cloud. The surrounding landscape is a mosaic of miombo woodland, characterized by its distinctive umbrella-shaped trees, and riparian vegetation thriving along the riverbanks. Elevation is relatively low, averaging around 1000 meters above sea level, contributing to a generally stable atmospheric layer, though susceptible to localized inversions. The town’s urban character is primarily tourist-focused, with a relatively small permanent population. It sits on the edge of a significant urban–rural gradient, transitioning rapidly from built-up areas to extensive agricultural lands and wildlife conservancies. While there are no major industrial belts directly adjacent to Victoria Falls, the nearby town of Hwange supports a coal-fired power station, and agricultural activities in the broader region, including cattle ranching and maize cultivation, can contribute to localized emissions. The Zambezi River itself plays a crucial role in the local climate, moderating temperatures and contributing to high humidity. The valley’s topography, constrained by the surrounding plateau, can sometimes trap pollutants, particularly during periods of low wind speed, influencing air quality dynamics.

Victoria Falls experiences a tropical savanna climate with distinct wet and dry seasons, significantly impacting air quality. The dry season, typically from May to October, is characterized by lower rainfall and increased sunshine hours. During this period, the lack of rainfall means less particulate matter is washed from the atmosphere, and the drier vegetation becomes more susceptible to burning, both from controlled agricultural practices and, unfortunately, occasional wildfires. Temperature inversions are more common during the cooler, drier months, trapping pollutants closer to the ground, especially in the mornings. The wet season, from November to April, brings frequent rainfall and higher humidity. These rains effectively ‘scrub’ the atmosphere, removing particulate matter and gaseous pollutants, leading to generally improved air quality. However, the increased humidity can exacerbate respiratory issues for sensitive individuals. Fog, particularly during the early morning hours, is common during the wet season, which can temporarily reduce visibility and trap pollutants. Months like August and September, during the tail end of the dry season, often see a build-up of dust and smoke from agricultural burning, making them less favourable for outdoor activities, particularly for those with asthma or other respiratory conditions. Conversely, the months of March and April, with frequent rainfall, typically offer the best air quality. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory or cardiovascular conditions, should monitor local conditions and limit outdoor exposure during periods of elevated dust or smoke.