Multiple reports describe how prolonged hot weather can harm the body, with a focus on heat stroke. The articles explain that heat stroke occurs when the body overheats and can no longer regulate its temperature effectively. They note that the condition can escalate quickly, potentially leading to organ failure within hours. The warnings are presented in the context of a current UK heatwave, described as unusually hot weather. The articles characterize heat stroke as a serious medical emergency and underline that overheating from high temperatures poses health risks beyond mild heat-related illness. While they primarily focus on the danger of rapid progression to organ failure, they do not detail specific prevention steps or treatment in the provided text. Overall, the sources present a consistent message: during heatwaves, people are at increased risk of heat stroke, which can result in severe complications, including organ failure, if not addressed promptly.