As temperatures across parts of the UK are forecast to climb beyond 38°C, many workers are asking a simple question: how hot is too hot to work?
The current heatwave has already caused significant disruption across the country. Schools have reported difficulties maintaining comfortable learning environments, transport networks have experienced delays, and even major retailers have been forced to adapt. Bakery chain Greggs has announced the temporary closure of 11 stores due to extreme temperatures.
For millions of UK workers, however, the concern is not whether a shop closes for a day. It is whether they can continue working safely and comfortably while temperatures continue to rise.
Is there a legal maximum working temperature in the UK?
One of the most common misconceptions is that UK law sets a maximum workplace temperature.
Currently, there is no legal maximum temperature for workplaces in the United Kingdom.
However, employers still have clear legal responsibilities. They must provide a working environment that is safe, adequately ventilated and maintained at a reasonable temperature.
This means employers cannot simply ignore excessive heat.
Where temperatures begin affecting health, safety, wellbeing or productivity, employers should assess risks and consider practical adjustments.
What can workers ask for during a heatwave?
The key to resolving workplace concerns often starts with a conversation.
Possible options may include:
- Earlier start and finish times
- Later shifts to avoid peak temperatures
- Temporary home working arrangements
- Additional rest breaks
- Access to cooler working areas
- Flexible dress code policies
- Relocation away from direct sunlight
- Use of desk fans or cooling equipment
- Increased access to drinking water
Many employers recognise that small adjustments can significantly improve comfort and productivity during extreme weather.
Working from home during hot weather
For office-based workers, remote working may be a practical solution where workplace temperatures become excessive.
If your workplace lacks effective cooling or ventilation, it may be reasonable to discuss temporary home working arrangements.
Employers are not automatically required to approve every request. However, they should carefully consider whether alternative arrangements could help maintain both productivity and employee wellbeing.
Extra protections for some workers
Certain groups of workers may be more vulnerable during periods of extreme heat.
This includes:
- Pregnant workers
- Workers experiencing menopause symptoms
- Disabled workers
- Individuals with certain medical conditions
In these circumstances, employers may need to consider additional adjustments to help reduce health risks.
Every situation will depend on individual circumstances, but employers should take concerns seriously and carry out appropriate risk assessments.
What should employers be providing?
The Health and Safety Executive (HSE) expects employers to take reasonable steps to protect workers during periods of hot weather.
Practical measures may include:
- Providing fresh drinking water
- Improving airflow and ventilation
- Allowing flexible clothing policies where appropriate
- Adjusting workloads
- Scheduling demanding tasks during cooler periods
- Increasing rest opportunities
- Monitoring workers for signs of heat-related illness
Heat exhaustion and dehydration can develop quickly, particularly for workers carrying out physically demanding roles or working outdoors.
The Workers Union says
Communication remains the most effective tool available to both employers and workers. A sensible discussion about temporary adjustments can often resolve concerns before they become health and safety issues.
Our position remains clear: workers should not be placed in situations where excessive heat creates avoidable risks to their health, wellbeing or ability to perform their duties safely.
As the UK experiences increasingly frequent periods of extreme weather, workplace policies must evolve to ensure workers remain protected.
So in conclusion
With temperatures expected to exceed 38°C in some areas, workers should not suffer in silence.
Whether it involves adjusted working hours, additional breaks, flexible clothing policies or temporary home working arrangements, there are often practical solutions available.
The most important step is to raise concerns early and communicate with your employer, focus on health and safety, and work collaboratively with employers to create a safe and productive working environment for everyone.
