The UK faces a severe heatwave this week, with temperatures forecast to reach around 40C. The Met Office issues red heat-health warnings, prompting schools to review day-to-day operations and student comfort measures. Several reports say some schools are closing early in parts of England ahead of the worst of the heat and red warning conditions. Other guidance indicates that schools across England may close for short periods, including potential closures lasting up to two days, depending on local circumstances and safety assessments by headteachers. In parallel with closure decisions, some schools are relaxing uniform requirements to help reduce overheating, reflecting wider efforts to manage exposure to extreme temperatures. While the exact number of affected schools and the timing of any closures are not consistent across reports, all sources describe a similar trigger: forecast high temperatures, including the possibility of 40C, and the escalation of official warnings. The situation is treated as changeable, with decisions linked to weather forecasts and school-by-school risk assessments.