Taking a Climate and Health History: A One Health‑Informed Approach to Primary Care and Services

Climate change poses the greatest public health threat, disproportionately impacting communities in Low- and Middle-Income Countries (LMICs) where fragile health systems increase vulnerability. Despite this, clinical practice often overlooks climate-related health risks. Current approaches focus on single disciplines or settings, limiting broader integration. Incorporating a One Health approach-recognizing the interconnection of human, animal, environmental, and plant health-into routine clinical encounters offers a pathway to strengthen climate-health awareness. This manuscript presents practical guidance for integrating climate and health histories, with a focus on heat exposure, and emphasizes the role of physicians, other health providers and three categories of Community Health Workers (CHWs) across the care continuum. A case study illustrates how targeted climate and environmental inquiries during history-taking can advance diagnosis and patient education. Embedding One Health in clinical care bridges existing gaps, enhances early detection of climate-related illness, and promotes culturally sensitive, holistic health interventions in vulnerable communities.