High temperatures can cause heat exhaustion, dehydration and prickly heat.
The Workplace (Health, Safety and Welfare) Regulations 1992 say that your employer must maintain a reasonable temperature where you work, but it does not specify a maximum temperature. However, your employers are expected to prevent your workplace being uncomfortably hot. There should also be enough thermometers around the workplace so that you can check the temperature.
Your employer should make sure that you are not uncomfortably hot by installing suitable equipment, using ventilation or air conditioning, and by relaxing dress codes. You must also have access to drinking water.
If your workplace is uncomfortably hot, you can make a complaint to your local authority's health and safety inspectors (see our Safety Inspectors section). Your complaint will be treated in confidence.
The TUC has been campaigning for a maximum workplace temperature for many years and in 2011, the Bakers Food and Allied Workers Union launched its Cool it! campaign against high workplace temperatures.