The story below is a composite, drawn from the kind of heat incident that happens on Australian worksites every summer. The details are illustrative, but the pattern is real.
It was the third hot day in a row. The crew had started early to beat the worst of it, but by early afternoon the slab was radiating heat and there was no shade on that part of the site.
One of the younger workers had been quiet since lunch. He had stopped chatting, was moving slower, and had missed a couple of simple instructions. When his supervisor asked if he was alright, he said what almost everyone says: "Yeah, I'm fine. Just hot."
Twenty minutes later, he was confused, unsteady on his feet and could not answer basic questions. A workmate who had done first aid training recognised what was happening. They called triple zero, moved him into the shade, and started cooling him down while they waited for the ambulance.
He recovered. The difference between that outcome and a much worse one came down to one person knowing what they were looking at.
Why "I'm fine" is the most dangerous answer
Heat stress is unusual because the person affected is often the last to notice. Confusion, irritability and poor judgement are early signs, and they also make it harder for someone to recognise that they are in trouble. Younger and newer workers are especially likely to push on, because they do not want to look weak or slow the crew down.
That is why heat cannot be managed by asking people to speak up if they feel unwell. It has to be managed by the people around them knowing what to look for, and by the work being planned so that fewer people get to that point.
The warning signs
Heat exhaustion usually comes first. Watch for heavy sweating, pale or clammy skin, headache, dizziness, nausea, muscle cramps, weakness and unusual tiredness. Someone with heat exhaustion should stop work, move somewhere cool, rest and drink water. If they do not improve quickly, get medical help.
Heat stroke is a medical emergency. Signs include confusion, slurred speech, strange behaviour, loss of coordination, collapse, seizures and loss of consciousness. Their skin may be hot and dry, or they may still be sweating. If you suspect heat stroke, call triple zero straight away, move the person somewhere cool, and start cooling them with water, wet cloths and airflow while help is on the way.
The key message for every worker is simple: if a mate is acting out of character in the heat, treat it as heat illness until proven otherwise.
What a heat plan actually looks like
SafeWork NSW encourages businesses to develop a heat management plan in consultation with their workers before summer arrives. It does not need to be complicated, but it does need to be decided before the hot days, not during them.
A practical plan covers when heavy or exposed work is scheduled, so it happens in the cooler parts of the day. It covers shade, cool water and proper rest breaks, and who is responsible for making sure they happen. It covers how new workers are eased into hot conditions, since people who are not used to the heat are at higher risk. It covers what triggers a change, such as a forecast temperature at which certain tasks stop or move. And it covers who on site is trained to recognise heat illness and respond.
This matters more each year. In April 2026, the NSW Net Zero Commission's Heat Stress Spotlight Report recommended strengthening SafeWork NSW regulations to prevent heat stress in workplaces. Businesses that plan now will be well placed for whatever changes follow.
Make sure someone on every site knows what to do
The worker in our story was lucky that someone nearby had done first aid training. That should not come down to luck. Before the January heat arrives, check that every crew, shift and site has at least one person who can recognise heat illness and knows how to respond.
Anzen's first aid training is practical and built around real workplace scenarios, so your people know what to do when it counts. To book training for your team before summer, or to talk through your heat management plan, book a free 30 minute Safety Health Check with Glen Dunkley, our Managing Director.
Our free WHS course is also a good starting point for supervisors who want to understand their responsibilities for managing risks like heat.
Sources
Heat Stress Spotlight Report, NSW Net Zero Commission, April 2026
Working safely through the heat of summer, SafeWork NSW
SafeWork NSW, managing the risks of working in heat (guidance and heat management plan tips)
