The risks of swimming during a heatwave are heightened for children, weak swimmers, and those exposed to prolonged heat. Dehydration and fatigue can impair swimming ability, while crowded pools and distracted supervision increase the likelihood of accidents. Open water environments pose additional dangers, such as sudden drop-offs and cold water temperatures, which can lead to muscle cramps and reduced control. Early signs of heat illness, including dizziness, nausea, and heavy sweating, should not be ignored, as they can escalate into medical emergencies. These risks underline the importance of active supervision and adherence to safety measures.