Managing Workplace Safety During Hot Weather

With the UK set to experience heatwave conditions this week – and amber and red heat alerts now in place – it’s more important than ever to recognise the risks that extreme temperatures can bring to the workplace.

While warm weather can lift morale, prolonged high temperatures can quickly affect health, safety, and performance if not properly managed. Taking action now will help protect your team and maintain productivity during these unusually hot conditions.

Why Heat is a Workplace Risk

Hot weather doesn’t just cause discomfort, it can lead to serious health concerns, including:

• Heat exhaustion and heat stroke
• Dehydration
• Sunburn and long-term skin damage
• Fatigue, reduced concentration, and slower reaction times

These effects can increase the likelihood of mistakes, accidents, and injuries – particularly in physically demanding or outdoor roles.

Legal Responsibilities

Under the Health and Safety at Work etc. Act 1974, employers must protect the health, safety, and welfare of their employees.

While UK law sets minimum workplace temperatures, there is no maximum limit. Instead, employers are expected to ensure working conditions remain reasonable and safe, which includes managing the risks associated with excessive heat.

This makes hot weather planning an essential part of your overall risk management strategy.

Shorts in the Workplace: What’s Appropriate?

One of the most common questions employers face in hot weather is whether employees can wear shorts. While there’s no specific rule preventing shorts at work, they’re not always appropriate.

Employers should base decisions on risk, considering factors such as:

• Exposure to machinery or hazardous substances
• The need for skin protection as part of the task
• Site-specific rules or industry requirements
• Whether a suitable risk assessment has been completed

Where risks are low, allowing shorts can improve comfort and help reduce heat-related strain.

Where Risks Increase

Some working environments are more vulnerable than others, including:

• Outdoor roles exposed to direct sunlight
• Enclosed or poorly ventilated indoor spaces
• Manual or physically demanding work
• Work involving PPE that can trap heat

Understanding where risks are highest allows you to put the right controls in place.

Practical Steps for Employers

Managing heat at work is about making simple, sensible adjustments that reduce risk without disrupting operations.

Create Cooler Spaces

• Provide shaded areas for outdoor teams
• Improve airflow indoors through ventilation, fans, or air conditioning
• Set up rest areas where employees can cool down

Build in Extra Breaks

Encourage regular pauses, particularly during peak heat. Short, frequent breaks are more effective than fewer long ones.

Adjust Working Patterns

Where possible:

• Start earlier or finish later to avoid peak temperatures
• Rotate physically demanding tasks
• Reduce unnecessary travel

Review PPE and Dress Codes

Heavy or restrictive clothing can increase heat stress. Where safety allows, opt for lighter, breathable alternatives and consider relaxing non-essential dress requirements.

Protect Outdoor Workers

Provide:

• High‑factor sunscreen
• Guidance on sun protection
• Access to shade and drinking water

HSE guidance such as Keep Your Top On highlights the importance of protecting against UV exposure during outdoor work.

Communicate and Train

Employees should understand:

• The signs of heat stress
• How to reduce their risk
• What action to take if symptoms appear

A simple seasonal briefing or toolbox talk can make a big difference.

What Employees Can Do

Safe working in hot conditions is a shared responsibility. Employees should:

• Drink water regularly throughout the day
• Take breaks in cooler or shaded areas
• Avoid unnecessary exposure to direct sunlight
• Wear suitable clothing, including sun protection
• Speak up if they feel unwell or notice others struggling

Early symptoms like dizziness, headaches, or excessive sweating should never be ignored.

What Good Practice Looks Like

An effective approach to managing hot weather includes:

• Risk assessments that reflect seasonal conditions
• Clear, practical control measures
• Flexible working arrangements where possible
• Employees who understand the risks and how to respond
• Ongoing monitoring during periods of extreme heat

Key Takeaways

✅ Plan ahead for hot weather

✅ Keep people hydrated and cool

✅ Adjust work patterns and expectations

✅ Protect against sun exposure

✅ Make sure staff know the warning signs

With the right planning, controls, and communication in place, you can keep your team safe and your operations running smoothly – whatever the temperature.