Heat Break Planner

There is no single rule. A common practical approach is more frequent, shorter breaks as heat, humidity and physical effort increase — for example, a short rest every hour in moderate heat and every 30 minutes or less in high heat. New workers and heavy tasks usually need more breaks. Always adjust based on how workers actually look and feel, not just the thermometer.

Yes. Kitchens, warehouses, workshops and top-floor offices can become dangerously hot even when the outside temperature seems moderate. Poor airflow, machinery, ovens and roof heat all add up. Indoor workplaces should be planned for heat the same way outdoor sites are.

Sweat is the body's main cooling system. When humidity is high, sweat evaporates more slowly and the body struggles to cool down. The same air temperature feels — and is — more dangerous on a humid day than on a dry one.

Yes. Workers who are new to the job, returning from time off, or unused to hot conditions are at significantly higher risk in the first days of heat exposure. Build them up gradually and check on them more often.

No. The Heat Break Planner is a practical planning aid to help you think about heat risk in your workplace. It is not medical advice and not a legal compliance tool. For regulatory requirements, check your local occupational health and safety authority.