Stay cool, stay compliant: what are employers’ responsibilities as the temperature rises?

Britain is not a country built for the heat. Yet, as record-breaking highs threaten to become the new normal, heatwaves may become business owners’ newest HR consideration. So, what are your legal responsibilities this summer? And how can you keep your employees cool when the next heatwave hits? 

As an entrepreneur or small business owner, navigating these sudden climate extremes is critical to protecting your day-to-day operations. Ensuring a safe, comfortable workplace environment directly safeguards your team’s health, maintains high productivity, and nurtures long-term staff retention. 

Will there be another heatwave in 2026? Will heatwaves become more common in the future?

With summer 2026 already fracturing decades-old meteorological records across the UK, business owners are understandably concerned about upcoming disruptions. The Met Office has warned that after brief periods of settled weather, the return of intense heatwave conditions remains highly probable, particularly across London and the Southeast.  

This dramatic escalation is the result of global climate change, which is likely to see the prevalence of extreme weather conditions on both ends of the spectrum rise in the future. The Met Office has confirmed that a developing “Super El Niño” this summer is compounding global warming trends, significantly magnifying the frequency and severity of seasonal heat spikes. Reports from the BBC highlights that extreme atmospheric events are quickly shifting from rare anomalies into a standard summer reality.  

For expanding SMEs, the financial toll of extreme heat can be surprisingly steep. A landmark study published in 2024 by the London School of Economics’ Grantham Institute reveals that soaring temperatures lead to notable dips in national productivity, meaning proactive operational planning is essential to minimise the threat of working days lost to heat. 

will summers get hotter in the future? 

Yes. Long-term climate projections clearly indicate that UK summers will continue to grow hotter, drier, and more unpredictable. The combination of structural climate change and cyclical weather phenomena like El Niño means that small businesses can no longer afford to treat heatwaves as brief, minor inconveniences. Upgrading your workspace model now is an investment in long-term business success. 

What are employers’ responsibilities during a heatwave? 

When ambient temperatures climb into uncomfortable territory, every employer has a strict legal duty of care under the Health and Safety at Work etc Act 1974, which states that, employers “must ensure, as far as is reasonably practicable, the health, safety, and welfare of all their employees”. This means you must actively monitor and manage the internal workplace environment to prevent heat-related illness. 

There are no explicit guidelines for employers to navigate hot conditions, as the law recognises that the temperature of the workplace will vary based on the nature of the work done. However, as outlined by the House of Commons Library, the employer must work to identify and mitigate any environmental risks in the workplace, including heat. In recent years, the Health and Safety Executive (HSE)  have stressed the need for business leaders to be able to recognise the physical symptoms of heat stress, a dangerous condition that occurs when the human body can no longer cool itself down. 

What is the maximum legal temperature for the workplace? 

Currently, there is no maximum legal temperature cap for commercial properties in the UK. According to HSE, the law simply requires that indoor workplace temperatures remain “reasonable.” 

HSE statutory guidelines stipulate that there are no absolute responsibilities or hard and fast rules because specific operational settings, such as commercial bakeries, glassworks, or busy restaurant kitchens, are historically accepted as naturally hot places to work. However, because climate change is pushing summer spikes to dangerous new heights, unions are heavily lobbying for change. In 2024, the Trades Union Congress (TUC) started actively calling for a statutory maximum limit of 30°C for normal indoor environments, or 27°C for those engaged in strenuous physical labour. 

What does health and safety during a heatwave mean in practice? 

In practice, the complete lack of a hard legal temperature ceiling means that business owners must rely on thorough, adaptive risk management. Employers are expected to carry out localised health and safety risk assessments, taking into specific account vulnerable staff members or employees required to wear heavy personal protective equipment (PPE). 

Operating without rigid rules requires maintaining direct dialogue with your workforce and adjusting comfort controls iteratively.  

Crucially, prioritising thermal comfort is directly tied to business growth. Consistent workplace data and soft stats on employee sentiment prove that a happy workforce is a loyal workforce. When employees see their employer actively investing in their physical well-being, staff morale rises, and unwanted turnover drops. 

By using adaptive frameworks like the 2024 TUC Temperature Guide, forward-thinking SMEs can easily convert health and safety obligations into a competitive advantage that builds brand loyalty. 

Top tips to keep your team cool this summer 

Protecting your workplace environment from oppressive heat does not mean pausing your daily workflows. By introducing practical adjustments and choosing high-quality business accommodation, you can easily maintain peak comfort.  

• Relax dress codes: Allow your staff to ditch heavy corporate wear for lighter, casual clothing. 

• Keep cooling drinks accessible: Store a continuous, ready supply of fresh water in the communal fridge and stock refreshing ice lollies in the freezer. 

• Enhance mechanical airflow: Invest in premium oscillating fans or modern air conditioning units, and work with doors open to clear out stagnant air. 

• Reimagine your meetings: Move collaborative catchups outdoors in the shade where possible, or transfer them to dedicated, climate-controlled rooms. Many of the Capital Space business centres are conveniently located next to shaded areas and greenery to breathe a breath of fresh air into your meetings.  

Implementing these steps seamlessly is incredibly simple when you partner with the right workspace provider. For example, all Capital Space business centres are equipped with pristine kitchen facilities, giving your team plenty of fridge and freezer space to stay hydrated. 

If a sudden heat surge impacts your individual office space, you can instantly pivot by booking your team into professionally cooled, air-conditioned meeting rooms. Even better, if the heat has your team feeling stifled in a space they have outgrown, you can scale your business accommodation in as little as a month with our flexible, simple easy-in, easy-out monthly licence. 

By pairing the structural advantages of Kings Hill with the global cooling guidelines from the World Health Organisation and the Government’s Beat the Heat initiative, you can ensure your team remains safe, motivated, and positioned for business success all summer long. 

Taking proactive steps to optimize your workplace environment during extreme summer weather keeps your business fully compliant while cultivating a healthy, loyal, and highly productive workforce. 

If you are looking for office space from a provider that wants to support your business success, get in touch.