The short version
- Extreme heat has caused widespread school closures and early dismissals, particularly affecting students during critical examination periods.
- Meteorological data indicates that peak summer temperatures are arriving earlier in the year, shifting the window of extreme weather into June.
- Regulators and climate experts warn that without structural changes to the academic calendar or building infrastructure, learning loss could become significant.
The return of students to classrooms across Scotland marked the start of a new academic year in mid-August, adhering to a schedule similar to much of Europe. However, in England, Wales, and Northern Ireland, the start date remains set for early September. This divergence highlights a growing tension between established educational traditions and the physical realities of increasingly hot summers. While the duration of holidays is comparable across these regions, the timing of the break has left students in some areas exposed to peak heat while still in school.
Recent weather patterns have made this exposure acute. Classrooms without adequate air conditioning or ventilation became stifling as outdoor temperatures soared past 30 degrees Celsius. The intensity of the heat forced more than 1,000 schools across the UK to either close entirely or send pupils home before the afternoon peak. These disruptions were particularly problematic for students sitting GCSE and A-level exams, who faced conditions that experts say can significantly impair concentration and performance.
The severity of this summer’s weather cannot be overstated. The Met Office has indicated that this year is likely to become the hottest on record, characterized by five widespread heatwaves and four consecutive months where temperatures exceeded 35 degrees Celsius. Such a pattern is unprecedented in recorded history. June alone saw one of the most intense heatwaves, with seven consecutive days surpassing official thresholds just as examinations were underway. A temperature of 38 degrees Celsius was recorded in Norfolk, marking the hottest June day ever measured in the country.
Official warnings underscored the danger. The Met Office issued a red extreme heat warning at the end of June, signaling potential threats to life and advising people to stay cool and travel only if essential. This placed headteachers in difficult positions, forcing them to balance educational continuity with safety liabilities. Steve Chalke, founder of Oasis Academy, noted that such warnings created an inhibitor to teaching, leaving leaders accountable for student welfare while navigating unprecedented environmental conditions.
Data analysis reveals a clear shift in the timing of extreme heat. In the 1960s, the first day reaching 30 degrees Celsius typically occurred around July 13. By the 2020s, that average had moved forward to June 19. Will Lang, chief meteorologist at the Met Office, describes a lengthening of the de facto hot season, with heatwaves becoming more prevalent in May and September as well as the traditional summer months. This expansion of extreme weather windows complicates long-term planning for educational institutions.
The potential impact on learning is quantifiable. A study by the Met Office and University College London suggests that if global temperatures rise more than 2 degrees Celsius above pre-industrial levels, students could lose an estimated 8.2 days of learning per year due to extreme heat. This projection assumes current climate trajectories continue, highlighting the urgency of adaptation measures beyond simple reactive closures.
Concerns about preparedness are mounting among parents and officials alike. Baroness Brown, chair of the UK’s Climate Change Adaptation committee, has warned that high temperatures significantly impair children’s cognitive abilities. Sir Martyn Oliver, Ofsted’s chief inspector, echoed these concerns in February 2026, suggesting a need to reconsider holiday timing given the heat typically experienced during exam months. Parents like Andrea Bigger from London report personal experiences with heat-related illness in schools, expressing anxiety that the system is not adequately equipped for these new normal conditions.
As the academic year begins, the question remains whether shifting the school calendar is a viable solution. Moving holidays to avoid peak heat could preserve instructional time and protect student health, but it requires significant coordination across regions and sectors. Until structural changes are implemented, schools must continue to manage immediate risks through ad hoc measures like heat days, which may become more frequent as climate change drives hotter and more volatile summers.
Sources behind this briefing
Go to the original reporting
- BBC News↗How a new era of heatwaves could shake up the school calendar
