Increasingly frequent and intense heatwaves are disrupting UK classrooms, leading to calls for changes to the school year or improved building infrastructure.

Extreme summer heat in the UK is causing significant disruption to schools, with over 1,000 institutions closing or sending students home early during recent heatwaves. As temperatures rise earlier in the year, experts and parents are debating whether to shift the school calendar or invest in climate-resilient infrastructure like air conditioning. The Met Office reports that the UK's "hot season" is lengthening, creating new challenges for students and staff during peak exam periods.

Impact on Learning and Exams

Research indicates that high temperatures significantly impair student performance and concentration. A report from the Climate Change Committee found that taking an exam on a 32C day is associated with a 10% lower likelihood of passing compared to a 22C day. Furthermore, a 2024 study in Climate Risk Management suggests that temperatures above 24C can compromise learning, with performance declining by 2% to 12% for every degree increase.

Calls for Structural Change

Some officials, including Ofsted's chief inspector Sir Martyn Oliver, have suggested reconsidering the timing of school holidays to avoid peak heat during exam periods. Others, such as parent Gemma Beake, argue that the focus should be on upgrading school buildings with better ventilation and air conditioning to ensure they remain safe environments. Currently, there is no legal maximum temperature for classrooms, unlike the informal guidance for minimum temperatures.

Shifting Climate Patterns

Met Office data shows a clear trend of earlier and more frequent heatwaves. In the 1960s, the first 30C day occurred on average on July 13; in the 2020s, that date shifted to June 19. With projections suggesting global temperatures could rise more than 2C above pre-industrial levels, some studies estimate students could lose an average of 8.2 days of learning annually due to extreme heat.