The Met Office has expanded its extreme heat warning to cover four days, from 1am on Monday to midnight on Thursday, as sweltering temperatures of up to 38C are expected across the Midlands, the south, and Wales. Birmingham is forecast to reach 38C by Thursday, following a record-breaking May when the hottest ever May day was recorded at 34.8C in London, surpassing the previous record of 32.8C set in 1922.
What are the rules on workplace temperature?
Under UK law, there is no specific maximum or minimum workplace temperature. The government's health and safety guidance states that "during working hours the temperature in all indoor workplaces must be reasonable." For minimum temperatures, guidance recommends 16C, or 13C for employees undertaking physical labour. However, no maximum temperature threshold is currently set.
Employers are legally required to adhere to the Health and Safety at Work etc. Act 1974, which includes maintaining a comfortable temperature and ensuring clean, fresh air. The Management of Health and Safety at Work Regulations also require employers to assess risks to workers, including those posed by extreme temperatures, and implement measures to safeguard them.
What about outdoor workers?
For those working outdoors, the Construction (Design and Management) Regulations stipulate that adequate protection from harsh weather conditions must be provided, and site rest facilities must be kept at an appropriate temperature. Workers are encouraged to raise concerns with their employer if the workplace becomes uncomfortable.
As the heatwave intensifies, many office workers will benefit from air-conditioning, but those in outdoor roles or poorly ventilated spaces may face greater challenges. The Met Office warning highlights the need for employers to take proactive steps to ensure worker safety during extreme heat.
