Australian summers can be brutal, especially for people working outdoors. Construction workers, gardeners, road crews, farmers, tradies and warehouse staff often spend long hours in intense heat and direct sunlight. On a hot day, temperatures on worksites can feel even higher due to reflected heat from concrete, steel and machinery.
Working in extreme heat isn’t just uncomfortable. It can be dangerous. Heat-related illnesses, dehydration, fatigue and sunburn can all affect safety and productivity. Protecting workers requires planning, the right equipment and a culture that takes heat stress seriously. Even clothing choices matter, and breathable, lightweight options such as custom hi vis singlets can help workers stay visible while keeping cooler during hot conditions, where they suit the work and site rules.
Understand the risks of heat stress
Heat stress occurs when the body can’t cool itself effectively. Prolonged exposure to high temperatures, physical exertion and inadequate hydration can lead to heat-related illnesses.
Heat exhaustion may cause symptoms such as heavy sweating, dizziness, headaches, nausea, weakness and muscle cramps. If not addressed, it can progress to heatstroke, a medical emergency that can be life-threatening.
Signs of heatstroke may include confusion, slurred speech, collapse, seizures and hot, dry skin. Anyone showing symptoms of heatstroke needs urgent medical attention. Call 000 immediately.
Heat can also affect concentration and decision-making, increasing the risk of accidents on worksites.
Plan work around the weather
Planning is one of the most effective ways to manage heat. Monitor weather forecasts and heat warnings, particularly during summer.
Where possible, schedule physically demanding tasks for cooler parts of the day, such as early morning or late afternoon. Rotate tasks to reduce prolonged exposure to heat. Allow extra time for breaks during hot weather and consider reducing workloads when temperatures are extreme.
Providing shaded rest areas can make a significant difference. Portable shelters, umbrellas and shade structures help workers cool down during breaks.
Keep workers hydrated
Dehydration can happen quickly in hot weather, especially during physical work. Workers should drink water regularly throughout the day, rather than waiting until they feel thirsty.
Make cool drinking water easily accessible across the worksite. Encourage workers to carry water bottles and take regular drink breaks. In some situations, electrolyte drinks may help replace salts lost through heavy sweating. Avoid excessive caffeine and alcohol, which can contribute to dehydration.
Choose the right clothing and protect against the sun
Workwear can affect how comfortable workers feel in the heat. Lightweight, breathable fabrics help air circulate and allow sweat to evaporate.
High-visibility clothing is essential on many worksites, but it doesn’t have to be heavy or uncomfortable. Breathable hi-vis shirts, vented garments and moisture-wicking fabrics can improve comfort while maintaining visibility. Wide-brimmed hats, neck flaps and sunglasses help protect against sun exposure. Choose clothing that meets workplace safety requirements and relevant standards for the job.
Australia has one of the highest rates of skin cancer in the world, making sun protection essential for outdoor workers. Encourage workers to wear sunscreen with a high sun protection factor and reapply it regularly throughout the day. Protective clothing, hats and sunglasses provide additional protection. Employers can support sun safety by providing sunscreen, shade and education about the risks of UV exposure.
Train workers to recognise warning signs
Workers should know the signs of heat-related illness and what to do if they or a colleague are affected. Encourage a buddy system where workers keep an eye on each other. Make sure supervisors are trained to respond quickly if someone shows signs of heat stress. First aid kits, cooling equipment and emergency procedures should be readily available.
New workers, people returning from leave and those not used to working in hot conditions may need time to acclimatise. Gradually increasing exposure to heat can help the body adapt.
Meet work health and safety obligations
Employers have a legal duty to manage risks to health and safety, including risks associated with working in heat. This may involve assessing heat-related hazards, providing appropriate controls and consulting with workers.
Controls may include adjusting work schedules, providing shade and water, supplying suitable clothing and equipment, and training workers to recognise and respond to heat stress. Safe Work Australia and state regulators provide guidance on managing heat risks.
Summer worksites can be challenging, but heat-related illness is preventable. By planning work around the weather, keeping workers hydrated, providing suitable clothing and promoting sun safety, businesses can protect their teams and maintain productivity throughout the hottest months of the year.