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Caimanera, nestled on the southeastern coast of Cuba within the Guantánamo Province, occupies a unique and geographically constrained position. Situated at approximately 19.99°N, 75.15°W, the city lies directly across the Bahia de Guatánamo (Guantanamo Bay) from the U.S. Naval Base, a significant geopolitical factor shaping its development. The terrain is predominantly low-lying, characterized by coastal plains and gently undulating hills rising to modest elevations. This flatness, combined with its coastal location, contributes to a relatively humid climate and limited natural ventilation. The surrounding landscape is a mix of scrubland, mangroves along the bay’s edge, and pockets of agricultural land, primarily focused on sugarcane cultivation. This agricultural activity, while vital to the regional economy, can contribute to localized air pollution through burning practices, particularly during harvest seasons. The urban–rural gradient is gradual; Caimanera itself is a small town, transitioning quickly into rural agricultural areas and the broader, sparsely populated eastern Cuban landscape. The bay’s presence significantly influences local weather patterns, often creating sea breezes that can disperse pollutants, but also trapping them under certain atmospheric conditions. The lack of significant industrial belts within immediate proximity mitigates large-scale industrial pollution, though the port facilities servicing the naval base and local fishing industry do contribute to localized emissions. Topography limits the natural dispersion of pollutants, making the town susceptible to stagnant air conditions, especially during periods of calm weather.

Caimanera’s tropical climate dictates a wet and dry season pattern, profoundly influencing its air quality. The dry season, typically spanning from November to April, often sees a slight improvement in air quality due to reduced humidity and increased wind speeds generated by the northeast trade winds. These winds help to disperse any pollutants, though periods of calm can still lead to localized stagnation. The wet season, from May to October, brings increased rainfall and higher humidity. While rain naturally helps to cleanse the atmosphere, the increased humidity can trap pollutants closer to the ground, particularly during periods of reduced wind. The sugarcane harvest, concentrated within the wet season, introduces a significant source of particulate matter from controlled burns, impacting air quality considerably. Fog, a relatively infrequent occurrence, can exacerbate pollution by trapping emissions near the surface. Temperature inversions, though not as common as in more temperate climates, can occasionally occur, preventing vertical mixing and leading to pollutant accumulation. During the peak of the wet season (July-August), outdoor activities should be approached with caution, especially for individuals with respiratory sensitivities. The dry season offers generally more favourable conditions, but vigilance is still required during periods of calm. Sensitive groups, including children, the elderly, and those with pre-existing respiratory conditions, should limit prolonged outdoor exposure during the harvest season and periods of stagnant air, regardless of the time of year. Maintaining awareness of local weather patterns and minimizing exposure during periods of reduced air circulation is crucial for protecting respiratory health.