Working in a heatwave

As heatwaves become more frequent across the UK, employers are facing a new workplace challenge: how to keep employees safe, comfortable and productive during periods of extreme heat.

While there is currently no legal maximum workplace temperature in the UK, employers still have a duty of care to protect the health and wellbeing of their teams. Even moderate increases in temperature can affect concentration, productivity, energy levels and workplace safety.

Here are some practical ways businesses can support employees during a heatwave:

1. Offer Flexible Working

Allow employees to adjust their working hours where possible. Earlier start and finish times can help staff avoid working during the hottest parts of the day, while remote or hybrid working may provide a more comfortable environment.

2. Relax Summer Dress Codes

During periods of extreme heat, employers should consider temporarily relaxing dress code expectations. Allowing lighter, more relaxed clothing e.g. shorts and T-shirts in the office can help employees stay comfortable while still maintaining professionalism where needed.

3. Keep Workspaces Cool

Simple changes can make a big difference:

• Use fans or portable air conditioning units
• Close blinds during peak sunlight hours
• Improve ventilation where possible
• Move employees away from particularly hot areas where practical

Even small adjustments can noticeably improve comfort levels.

4. Encourage Regular Breaks and Hydration

Employees should be encouraged to take more frequent breaks, particularly in physically demanding roles. Make drinking water easily available and remind teams to stay hydrated throughout the day.

You can also make it a little more fun:

• Send someone on an “ice lolly run”
• Provide cold drinks or fruit in the office
• Organise an informal iced coffee break
• Let teams take short cooling-off walks

Small gestures can go a long way in boosting morale during uncomfortable conditions.

5. Check In on Employee Wellbeing

Some employees may be more vulnerable to heat, including pregnant workers, those with underlying health conditions or employees carrying out manual work. Managers should check in regularly and create an environment where people feel comfortable speaking up if they are struggling.

6. Communicate Clearly

Sending practical reminders around hydration, wellbeing and temporary summer workplace adjustments can help employees feel supported and informed.

Heatwaves are no longer rare events — they are becoming part of normal working life. Employers who plan ahead and prioritise employee wellbeing will not only create safer workplaces, but also build stronger, more engaged teams in the process.