Story Highlight
– UK law lacks maximum temperature limit for working conditions.
– Employers must ensure “thermal comfort” and safety.
– Employees can refuse unsafe work under certain conditions.
– Unions advocate for a legal maximum temperature of 30C.
– Employers should provide hydration, breaks, and assess risks.
Full Story
As the UK experiences a notable heatwave, driving temperatures into the high twenties and low thirties, concerns about employee safety and productivity have sparked a significant discussion surrounding workplace regulations. According to recent research, searches for “too hot to work” have surged by over 2,000%, prompting legal experts to clarify the protections available to workers in such conditions.
A central issue for employees seeking relief is the absence of a legally defined maximum temperature for working conditions. Unlike the guidelines suggesting a minimum workplace temperature of 16°C—which drops to 13°C for physically demanding tasks—there are no official upper limits. Consequently, many employees may feel disheartened when learning they cannot simply down tools when temperatures soar.
UK employment law does, however, impose strict obligations on employers regarding the health and safety of their workforce. The Health and Safety at Work Act 1974 and the Workplace (Health, Safety and Welfare) Regulations 1992 outline an employer’s duty to provide a safe working environment and maintain “thermal comfort” for staff. James Muller, a Principal Associate with Weightmans’ health and safety team, highlighted that employers are required to take all “reasonably practicable” measures to protect their employees from heat-related health issues. Ignoring this duty could expose employers to potential enforcement actions from the Health and Safety Executive (HSE) or local authorities, and could lead to claims for personal injury compensation when workers are affected by heat-related ailments.
For employees contemplating leaving their workplace due to the heat, guidance remains cautious. Leaving without a valid reason could jeopardize their employment. Under Sections 44 and 100 of the Employment Rights Act 1996, workers may remove themselves from dangerous situations if they believe they are in “serious and imminent danger.” However, this legal protection is explicitly targeted towards immediate threats, not general discomfort caused by high temperatures.
When excessive heat genuinely poses a substantial health risk, it is the employer’s responsibility to take necessary actions, which may include allowing employees to leave early. Should employees be sent home while being available and willing to work, their entitlement to pay will likely depend on the circumstances and the particulars of their employment contracts.
Trade unions, including the Trades Union Congress (TUC) and UNISON, are pushing for the introduction of a specific legal cap on indoor working temperatures. The organisations have suggested a threshold of 30°C, or 27°C for jobs involving strenuous physical activity. Until such regulations are enacted, employees are encouraged to communicate concerns with their employers and advocate for thorough risk assessments regarding heat-related impacts on their health and productivity.
In terms of employer responsibilities during heatwaves, a proactive approach is essential. Employers are urged to conduct risk assessments and implement several key measures to protect their staff. These include introducing flexibility in working hours, ensuring adequate hydration and breaks, improving ventilation and cooling systems, and revising dress codes as appropriate.
Flexibility can play a vital role. For example, allowing employees to adjust their working hours to avoid commuting during peak heat, encouraging remote work, or shortening workdays can significantly relieve heat stress. Furthermore, rescheduling demanding tasks to cooler periods of the day—before 11 am or after 3 pm for outdoor jobs—can reduce risks significantly.
Providing a regular and safe supply of cool drinking water is crucial, alongside encouraging employees to hydrate regularly. Enhanced opportunities for breaks, particularly for those engaged in physically intense work, help mitigate the risks of heat-related illnesses.
While there is no legal requirement for air conditioning, creating a comfortable working environment is a statutory obligation. Maintaining proper ventilation through the use of fans, portable air conditioning units, or simply opening windows can contribute to achieving a workable temperature.
Additionally, employers should consider adjusting dress codes to better suit warmer conditions, although certain standards may still be necessary for safety and customer-facing roles. Employees should confirm dress code allowances with their employers rather than make assumptions regarding appropriate attire.
Particular attention must be paid to staff members with existing health issues or expectant mothers, as these individuals may be more vulnerable to the adverse effects of high temperatures. Conducting individual risk assessments for these employees is a critical step in ensuring their wellbeing.
With the increasing frequency of heatwaves in the UK, it is essential for both workers and employers to engage in open dialogue about safety measures and legal protections. As we face these rising temperatures, a collaborative approach can help safeguard the health and productivity of the workforce while navigating the challenges of extreme weather conditions.
Our Thoughts
To mitigate risks associated with heatwaves in the workplace, employers could improve their adherence to the Health and Safety at Work Act 1974 and the Workplace (Health, Safety and Welfare) Regulations 1992. Key preventative measures include conducting thorough risk assessments tailored to the specific conditions created by extreme heat, which is currently lacking in many workplaces.
Employers should implement flexible working arrangements, such as allowing remote work or altering hours to avoid peak heat times. Providing access to hydration, regular breaks, and enhanced ventilation, such as fans or open windows, is essential to comply with their duty of care regarding “thermal comfort.”
Failure to respond appropriately to heat-related risks can lead to breaches of health and safety legislation, putting employees at risk of heat stress and potential legal action from the Health and Safety Executive (HSE) or local authorities.
Employers must also pay special attention to vulnerable employees through individual assessments, ensuring a safe working environment is maintained for all. By adopting a proactive approach based on these regulations and guidelines, similar incidents can be avoided in the future.




















