As the UK bakes in a heatwave, a legal expert explains what workers' rights exist around workplace temperature and when you can legally down tools if it's too hot in the workplace08:03, 23 Jun 2026As scorching summer temperatures grip the UK, with a heatwave predicted to bring temperatures of up to 40 degrees, one legal expert is calling on the UK to examine how it can better safeguard workers from heat-related illness and injury.‌Many workers search for the rules on temperatures considered 'too hot to work in' during a UK heatwave, and currently, workplace temperatures fall under the Workplace (Health, Safety and Welfare) Regulations 1992. This legislation obliges employers to maintain a 'reasonable' temperature in the workplace. While a minimum temperature is established, there is no upper limit set at which conditions become too hot to work.‌The current Labour government is considering revising the regulations to introduce one, however this early heatwave suggests it could be a case of too little too late – according to John Kushnick, Legal Director at National Accident Helpline.‌Addressing the matter, Kushnick said: "The fact is that without a legal maximum, many people will feel pressured to continue working when it is not safe to do so."National Accident Helpline's own data shows that a staggering 41% feel pressured to cut corners on safety in order to get the job done faster, and 56% say that health and safety in their workplace is more box-ticking than genuine care."Put simply, without enforced policies, employees will continue feeling uncared for and forced to work when it is unsafe to do so."‌The expert stated: "If an employer neglects their responsibilities and someone is injured, that person may be able to claim compensation."What is expected of employers during hot weather?Employers are required to do whatever is 'reasonably practicable' to protect their workers' health, and they must ensure a safe environment where staff are not at risk of becoming unwell from the heat, according to Kushnick.He explained: "They must also take into consideration those with existing health conditions or vulnerabilities and provide reasonable adjustments.‌"If the temperature within the workplace rises to over 28 degrees, then it may have become too hot to safely work."Where is the danger of working in a heatwave?As temperatures soar, those most vulnerable to excessive heat are individuals working outdoors or on transport networks.Construction sites are exposed to the scorching sun throughout the day while on the Tube temperatures can reach as high as 40 degrees. In such conditions, it becomes extremely difficult to focus and operate machinery, resulting in a significantly heightened risk of errors being made.‌Measures such as the large fans positioned in Tube stations are unlikely to make any impact on the stifling heat.Even those working in offices face risks. The UK's older buildings, many with no or insufficient air conditioning, also present a hazard.Spending extended periods in elevated temperatures, even while seated, increases the risk of heatstroke and dehydration.Article continues belowWhat to do at work during hot weatherThe best course of action is simple. Take breaks, drink water, and speak up.Although there is no legally defined maximum workplace temperature, if you feel that the conditions in your workplace are unsafe, you are entitled to stop.