This 10-minute clinical briefing examines the ongoing flooding across Southern Africa and its implications for infectious disease risk and health system pressure in South Africa. It situates current events within a regional public health context, showing how displacement, disrupted water and sanitation systems, damaged infrastructure, and increased vector breeding are creating conditions for outbreaks of cholera and other diarrhoeal diseases, malaria, leptospirosis, and Rift Valley fever. The presentation translates these regional risks into practical relevance for South African clinicians, particularly in border and referral settings, where importation of cases and pressure on district and emergency services are most likely. It emphasises the importance of travel and exposure histories, early recognition of clinical red flags, and prioritised diagnostic pathways, including malaria testing, stool investigations, and appropriate laboratory notification. In addition, the briefing highlights the role of clinicians as frontline sentinels within the national surveillance system, stressing rapid reporting, infection prevention vigilance, and coordination with public health authorities to prevent local amplification of imported cases. Health system implications—including surge preparedness, surveillance sensitivity, and cross-border coordination—are framed as immediate operational priorities. Overall, the session aims to strengthen clinical awareness, preparedness, and early response capacity in South Africa by linking environmental events in the region directly to patient presentations, outbreak detection, and national health security.