Heatwave Safety Alert for Cambridgeshire Schools as Temperatures Rise 2026

Key Points

• Cambridgeshire County Council has issued a formal warning to school leaders in England about risks linked to handheld cooling fans and spray bottles as the UK heatwave continues.
• Amber and yellow heat-health alerts remain in place, with temperatures forecast to reach up to 36C (97F) in parts of southern England this week.
• The council highlighted two main concerns: lithium-ion battery fires in rechargeable handheld fans and the potential misuse of cooling sprays that schools cannot easily verify.
• Schools are being told to consider local circumstances, carry out risk assessments, and decide whether to ban or restrict such items.
• Options suggested include banning only rechargeable fans, prohibiting charging on site, or requiring spray bottles to be brought in empty and filled under controlled conditions.
• The advice was accompanied by a “heat checklist” to help schools take appropriate action during extreme heat.
• The Midlands, eastern and southern England are under amber heat-health alerts from the UK Health Security Agency until 21:00 BST on Sunday 12 July.
• The council, which is Liberal Democrat-controlled, said it wrote to head teachers “highlighting the potential risks associated with handheld fans and water sprays on school sites”.
• The council noted that lithium-ion fires can generate their own heat and oxygen, allowing them to spread faster than some other types of fire.
• As reported by the council in its letter to head teachers, “If schools wish to permit handheld fans, they will need to carefully consider how to manage these risks.”

Cambridge (Cambridge Tribune) July 09, 2026 – Schools across Cambridgeshire and beyond have been warned to reassess the safety of handheld cooling fans and water sprays as the UK continues to face a prolonged heatwave. The alert comes after Cambridgeshire County Council sent a formal letter to head teachers drawing attention to what it described as “potential risks” linked to these items on school premises.

The council’s warning follows a series of amber and yellow heat-health alerts issued by the UK Health Security Agency, which indicate that temperatures could climb as high as 36C (97F) in parts of southern England during the coming days. With schools already under pressure to keep pupils safe and comfortable in extreme heat, the council has urged leaders not to treat handheld fans and spray bottles as harmless cooling aids without proper scrutiny.

Are lithium-ion battery fans a fire hazard in overheated classrooms?

According to the Liberal Democrat-controlled council, some handheld fans contain lithium-ion batteries that “can overheat or fail in extreme temperatures, with the potential to cause a fire”. The authority explained that lithium-ion fires are particularly dangerous because they can generate their own heat and oxygen, meaning they can spread faster than many other types of fire.

This risk is heightened during a heatwave, when ambient temperatures are already high and classrooms may struggle to maintain safe internal conditions. As reported by the council in its letter to head teachers, “If schools wish to permit handheld fans, they will need to carefully consider how to manage these risks”. It suggested that schools might, for instance, consider banning only rechargeable fans or prohibiting the charging of fans on site.

Can spray bottles be misused or bring hazardous substances into school?

The council also flagged concerns about water spray bottles, noting that schools “cannot easily verify the contents of spray bottles and there is risk of misuse”. While many students may use sprays purely for cooling, the authority warned that bottles could potentially contain substances other than plain water, raising issues of safety, hygiene, and discipline.

In response to this risk, the council said schools could consider “requiring spray bottles to be brought to school empty and then filled under controlled circumstances”. This approach would allow schools to monitor what is being sprayed and prevent the introduction of unknown or hazardous liquids into the school environment.

How are heat alerts and council guidance shaping school safety policies?

The warning from Cambridgeshire County Council is part of a broader national response to the current heatwave. The Midlands, eastern and southern England have been placed under amber heat-health alerts by the UK Health Security Agency until 21:00 BST on Sunday, 12 July. Amber alerts indicate that there is a high risk of heat stress, particularly for vulnerable groups such as young children, older people, and those with underlying health conditions.

In line with this, the council said it had sent a “heat checklist” to help schools take “appropriate action” during periods of extreme heat. The authority wrote to head teachers “highlighting the potential risks associated with handheld fans and water sprays on school sites”, making clear that the guidance was not intended to ban cooling measures outright but to ensure that they were introduced safely.

What options are schools being given to manage fan and spray risks?

The council’s letter stresses that it is “for individual schools to consider their local circumstances, undertake appropriate risk assessments and determine whether such items should be permitted”. This approach recognises that different schools face different challenges: some may have limited ventilation, while others may have better cooling systems or shaded outdoor areas.

The guidance suggests several practical options:

• Schools may consider banning only rechargeable fans, while allowing battery-free alternatives.
• Charging of handheld fans on site could be prohibited to reduce the risk of overheating.
• Spray bottles could be required to be brought in empty and filled under controlled conditions.
• Staff could be briefed on safe use of sprays and fans, and on how to spot signs of battery overheating.

These measures are designed to balance pupils’ need for relief from the heat with the need to prevent fire, chemical exposure, or disciplinary issues linked to misuse.

Why is this guidance being issued now during the UK heatwave?

The timing of the council’s warning is directly linked to the ongoing heatwave and the associated heat-health alerts. As temperatures rise, more students and staff are expected to seek personal cooling methods, including handheld fans and spray bottles. This increased use, combined with the higher ambient temperatures, raises the probability that lithium-ion batteries will overheat and that sprays will be misused.

The council’s letter also reflects a wider pattern of local authorities issuing heat-related safety guidance to schools as part of national efforts to manage the impacts of extreme heat. By proactively addressing the risks associated with these items, the authority aims to reduce the likelihood of incidents such as fires, chemical injuries, or disciplinary problems that could disrupt schooling during a critical period.

What should schools do in response to the council’s warning?

School leaders are expected to review their existing policies on personal cooling devices and decide whether to allow, restrict, or ban handheld fans and spray bottles. The council emphasises that each school must carry out its own risk assessment, taking into account factors such as:

• The condition and type of ventilation and cooling systems in the building.
• The number of students likely to bring fans or sprays.
• The capacity of staff to monitor and manage the use of such items.
• Past incidents of fire, battery overheating, or misuse of sprays.

Schools that choose to permit fans or sprays will need to implement clear rules, such as prohibiting charging on site or requiring sprays to be filled only under staff supervision. In parallel, schools should ensure that staff are aware of the signs of battery failure and are prepared to respond quickly if a fire or other incident occurs.

Background: How heat-health guidance and school safety policies have evolved

The guidance issued by Cambridgeshire County Council reflects a growing trend of local and national authorities integrating heat-health warnings into school safety frameworks. In recent years, the UK has seen a series of extreme heat events, prompting the UK Health Security Agency to formalise its heat-health alert system. Amber and yellow alerts now serve as standard triggers for advice to schools, hospitals, and other public services about how to protect vulnerable people during periods of high temperature.

Local councils have increasingly taken the lead in translating these national alerts into practical guidance. In Cambridgeshire, the council’s “heat checklist” built on earlier work by schools and local authorities to manage heat-related risks, such as revising outdoor activity schedules, increasing water provision, and improving ventilation. The specific focus on handheld fans and spray bottles marks a more targeted approach, acknowledging that personal cooling devices are now widely used but can carry hidden risks if not properly managed.

Similar developments can be seen internationally. In Pakistan, for example, the Pakistan School Safety Framework (PSSF) includes guidance on the storage and handling of inflammable and toxic materials, reflecting a broader concern with preventing fire and chemical hazards in schools. While the context differs, the underlying principle is the same: schools must balance the need for student comfort and safety against the risks introduced by new technologies or behaviours, especially during extreme weather.

Prediction: How this development could affect students, parents and school staff in the UK

If schools broadly adopt the council’s recommendations, the immediate effect will likely be a reduction in the number of handheld rechargeable fans and spray bottles allowed on campus. Students who rely on these items for comfort during hot days may face stricter rules, potentially increasing their dependence on school-provided cooling measures such as better ventilation, shaded areas, or access to cold water.

Parents may need to adjust their routines, for example by ensuring that children do not bring rechargeable fans to school or by preparing empty spray bottles for filling at school. This could lead to more discussions between families and schools about what cooling methods are permitted, and possibly to increased demand for school-led cooling solutions.

For school staff, the guidance introduces new responsibilities. Teachers and support staff will need to be trained to identify signs of battery overheating, monitor the use of spray bottles, and enforce any new rules on charging or filling. This could add to workload pressures, particularly in schools already dealing with limited resources for ventilation and cooling. However, if effectively implemented, the measures could also reduce the risk of fire incidents, chemical exposure, and disciplinary problems, ultimately making schools safer environments during heatwaves.

In the longer term, this development may encourage wider adoption of standardised heat-safety protocols across local authorities, with handheld fans and sprays becoming a named category in school risk assessments. That could lead to more consistent rules nationwide, clearer guidance for parents, and potentially greater investment in school infrastructure designed to cope with extreme heat without relying on personal devices.