Feeling the Heat? What Every UK Employer Needs to Know

As temperatures continue to rise across the UK, periods of hot weather are becoming more frequent and intense. While many people welcome the sunshine, hot working conditions can present significant challenges for employers and employees alike.

Employers have a legal duty to protect the health, safety, and wellbeing of their workforce, and this responsibility does not disappear when the temperature rises.

Is There a Maximum Workplace Temperature?

One of the most common questions employers ask during a heatwave is whether there is a legal maximum temperature for workplaces.

The simple answer is no.

UK legislation does not specify a maximum workplace temperature. However, employers are still required under health and safety legislation to ensure that workplace temperatures are reasonable and do not pose a risk to employees’ health and safety.

This means employers should assess the impact of hot weather on their working environment and take appropriate steps to reduce any risks.

What Risks Does Hot Weather Create?

Excessive heat can affect employees in a variety of ways, including:

• Dehydration
• Heat exhaustion
• Heat stroke
• Fatigue
• Dizziness and headaches
• Reduced concentration and productivity
• Increased risk of accidents and mistakes

Certain working environments can present a greater risk, including:

• Outdoor workplaces and construction sites
• Warehouses and distribution centres
• Manufacturing facilities and workshops
• Kitchens and hospitality settings
• Offices with poor ventilation or limited cooling

Reviewing Your Risk Assessments

When temperatures rise, employers should review their existing health and safety risk assessments to determine whether additional control measures are needed.

Consider factors such as:

• Workplace temperature and ventilation
• The nature of the work being undertaken
• The physical demands of the role
• Exposure to direct sunlight
• Availability of rest facilities
• Employees who may be more vulnerable to heat

Risk assessments should be a practical exercise, focusing on identifying risks and implementing reasonable measures to minimise them.

Practical Steps Employers Can Take

Simple measures can make a significant difference during periods of hot weather. Depending on the workplace, employers may wish to consider:

• Providing Access to Drinking Water: Employees should have easy access to fresh drinking water throughout the day and be encouraged to stay hydrated.
• Improving Ventilation and Cooling: Where possible, increase airflow through fans, air conditioning, open windows, or other ventilation systems.
• Adjusting Working Hours: For outdoor or physically demanding roles, consider scheduling work during cooler parts of the day and reducing strenuous activities during peak temperatures.
• Increasing Rest Breaks: Additional breaks can help employees cool down, rehydrate, and recover from the effects of prolonged heat exposure.
• Reviewing Dress Codes and PPE: Where appropriate, employers may wish to relax dress code requirements during hot weather. If PPE is required, ensure it remains suitable and consider whether alternative options are available that still provide the necessary protection.

Monitoring Vulnerable Employees

Some individuals may be more susceptible to heat-related illness, including:

• Pregnant employees
• Older workers
• Employees with underlying health conditions
• Employees taking certain medications

Employers should be mindful of individual circumstances and consider whether any reasonable adjustments or additional support may be required.

Don’t Forget Homeworkers

Hot weather can affect employees working from home just as much as those in the workplace.

While employers may have less direct control over homeworking environments, they should still encourage employees to raise any concerns and provide guidance on staying safe and comfortable while working during periods of extreme heat.

Training and Awareness

Employers should ensure managers and employees know how to recognise the warning signs of heat-related illness.

Symptoms may include:

• Excessive sweating
• Dizziness or light-headedness
• Headaches
• Muscle cramps
• Nausea
• Confusion or disorientation

Employees should understand what action to take if they or a colleague begin to experience symptoms.

A Sensible Approach to Employee Wellbeing

Hot weather can have a significant impact on employee wellbeing, performance, and safety. Taking proactive steps to manage the risks not only helps employers meet their legal obligations but also demonstrates a commitment to supporting their people.

A review of workplace arrangements, clear communication, and a few practical adjustments can help reduce the risk of heat-related illness and ensure employees remain safe, comfortable, and productive during periods of high temperatures.

If you would like support reviewing your workplace policies or employee wellbeing initiatives, our team would be happy to help.