Posted Date: 2nd June 2025
As we enter the Summer months, it may be useful to remind yourself of the rights which workers have during hot weather.
Under the Workplace (Health, Safety and Welfare) Regulations 1992, employers have a legal obligation to provide a 'reasonable' temperature in the workplace. There is no legal maximum working temperature for workplaces, as they all differ. However, you should try to keep the temperature at a comfortable level and provide clear and fresh air (HSE).
Impact on health
Working during a heat wave can lead to heat stress, which can affect individuals differently, but symptoms usually include:
- heat rash
- severe thirst/dehydration
- fainting
- a lack of concentration
- muscle cramps
- heat exhaustion
- heat stroke (HSE)
You should take particular precautions for employees who are more likely to be vulnerable to high temperatures, such as those who are pregnant or have health conditions. Pregnancy, and health conditions which amount to a disability, are protected characteristics under the Equality Act, and failing to provide reasonable adjustments could result in a discrimination claim.
Female employees who are going through the menopause may also be more vulnerable, particularly if they are suffering with hot flushes. Although the menopause isn’t a protected characteristic, age and gender are (as the menopause only affects women of a certain age), therefore there is still a risk in discrimination if you fail to provide reasonable adjustments to support them in the workplace.
As well as temperature, factors such as work clothing, humidity and how physical the work is may lead to heat stress.
How can you reduce the risks?
The Health and Safety Executive advises the following:
- Control the temperature. Remove or reduce the sources of heat if possible, for eg. use air condition and fans, use physical barriers to reduce exposure to heat from machinery, change processes to reduce physical exertion
- Control how long employees are exposed to high temperatures. Set limits, change working hours to cooler times of the day, provide more rest breaks in cooler conditions
- Ensure workers do not become dehydrated by providing cool water and encourage them to drink frequently, little and often
- Consider using specialised PPE which has cooling systems or breathable fabrics
- Provide training and information to workers on the risks of heat stress, the symptoms, safe working practices and what to do in an emergency
- Identify those who are more at risk and provide reasonable adjustments if practicable
- You should continue to monitor your workforce during the heatwave, looking for signs that they may be struggling with heat stress (HSE)
- You could also consider flexible working options, such as working from home if employees are cooler and more comfortable, or a temporary change in hours, alongside relaxing rules on dress code (subject to rules on safety).
SafeWise can support you with keeping your workers safe and your business in line with health and safety legislation.
Contact us on 01922 279129 for a free consultation.