Key Points
- Hundreds of schools in England and Wales are expected to close or change hours because of extreme heat.
- School leaders and unions have warned that high temperatures can make classrooms unsafe and difficult for pupils and staff.
- Some schools are sending children home early, while others are changing the school day to avoid the hottest hours.
- Reports indicate that schools are also relaxing uniform rules, limiting outdoor activity, and asking pupils to bring extra water.
- The issue has raised wider concern about how well UK schools can cope with hotter summers.
Wales (Wales Times) June 23, 2026 – Hundreds of schools across England and Wales are expected to close, open late, or finish early this week as a heatwave pushes temperatures to dangerous levels, according to reporting by the Guardian and other UK outlets.
As reported by the Guardian, schools are acting because unions say it is unsafe for children and staff to stay in hot classrooms for long periods, especially when buildings are poorly ventilated and temperatures rise through the day. The Independent reported that scores of schools are already closing or changing their hours to reduce the risk of heat exhaustion and dehydration among pupils.
The news has become a practical test of how Britain’s education system responds when weather conditions move beyond normal summer discomfort. In several cases, school leaders are choosing caution over continuity, particularly where buildings retain heat and classrooms become harder to use safely.
Why are schools changing hours?
Schools are adapting their routines because extreme heat can affect concentration, learning, and physical wellbeing. BBC reporting noted that high indoor temperatures can disrupt learning and reduce concentration, while also creating risks for both pupils and teachers.
According to reports from several outlets, schools are taking measures such as cancelling outdoor play, avoiding PE lessons, and asking children to bring extra water and sunscreen. Some schools have also eased uniform requirements so pupils do not have to wear blazers and ties during the hottest part of the day.
The timing of closures is also important. A number of schools are choosing to finish early so that pupils are not kept indoors during the hottest afternoon hours, when temperatures are expected to peak.
What are schools saying?
Education leaders and unions have argued that schools should not be expected to function as normal when temperatures become extreme. The Guardian reported that unions consider it dangerous for schools to stay open in very high temperatures, particularly where classrooms are not designed for such weather.
The BBC also highlighted concerns from school staff who have seen pupils become distressed, sleepy, or unwell in overheated classrooms. These concerns are not only about comfort but also about safety, attendance, and whether teachers can deliver lessons effectively in such conditions.
Reporting across the day suggests that the response is uneven, with some schools fully open, some closing early, and others changing schedules according to local conditions. That inconsistency reflects the lack of a uniform national standard forcing closure when temperatures rise.
How widespread are the closures?
The Independent said scores of schools across England and Wales are closing or finishing early this week, while the Express referred to a wider list of closures linked to the heatwave. The Sun also reported that dozens of schools were shutting early as temperatures surged, showing that the disruption is not limited to one region.
The scale of the disruption appears to depend on local decisions by school leaders rather than one single national order. That means parents in one area may see a normal school day, while families elsewhere are asked to collect children early or keep them at home.
This patchwork response also highlights a bigger policy issue: schools are being forced to improvise because many buildings were not designed for prolonged hot weather. As the climate warms, that problem is likely to become more frequent rather than exceptional.
What does this mean for parents and pupils?
For parents, the immediate effect is disruption to work schedules, childcare arrangements, and transport plans. For pupils, especially younger children, the biggest concern is health and comfort during hot conditions that can make normal classroom routines difficult.
For teachers and school staff, the issue includes not only lesson delivery but also supervision, safeguarding, and managing children who may become tired or unwell. Reports of changing dress codes, cancelling sport, and limiting outdoor activity show that schools are trying to reduce risk while keeping some form of education going.
In practical terms, the heatwave is forcing education leaders to choose between learning time and safety. That trade-off is likely to remain a recurring challenge during future hot spells.
Background of the development
This development sits within a wider discussion about extreme heat and UK school infrastructure. Recent reporting and research have raised concerns that older school buildings can trap heat, making classrooms uncomfortable or unsafe well before outdoor temperatures reach their peak.
The BBC has previously reported on concerns that hot classrooms can affect learning and exam conditions, while other research has examined how UK schools are adapting to rising temperatures. That makes the current closures part of a longer-running issue rather than a one-off emergency.
The present heatwave has simply brought the problem into sharper focus, with schools making immediate decisions to protect pupils and staff. In that sense, the closures are both a response to today’s weather and a warning about future summer planning.
Prediction
For parents in England and Wales, further heatwaves are likely to bring more short-notice timetable changes, early finishes, and occasional closures. For pupils, that could mean more disrupted classroom time during the hottest months, especially in schools with poor ventilation or limited cooling.
For school leaders, the development may increase pressure to revise heat policies, improve building adaptation, and set clearer rules for extreme temperatures. Over time, local authorities and education policymakers may need to treat heat resilience as a basic part of school planning rather than an emergency measure.
