Product Overview

Summary: This Heat Stress and Hydration Guidelines SOP provides a clear, practical framework for preventing heat-related illness in Australian workplaces. It sets out step-by-step controls, hydration protocols, and monitoring requirements so supervisors and workers can safely manage hot conditions, extreme weather, and physically demanding tasks.

Working in hot and humid Australian conditions presents a significant risk of heat stress, dehydration, heat exhaustion and heat stroke, particularly for workers performing physically demanding tasks or wearing PPE. This Heat Stress and Hydration Guidelines Safe Operating Procedure translates WHS obligations into a practical, easy-to-follow system that can be applied across construction sites, warehouses, manufacturing facilities, agriculture, events, and any outdoor or poorly ventilated work environment. It provides clear criteria for identifying when heat becomes a risk, how to assess environmental and personal factors, and the controls that must be implemented before, during and after exposure to heat.

The SOP addresses the full lifecycle of risk management: from planning work around temperature forecasts and extreme weather warnings, to implementing shade and rest breaks, hydration schedules, acclimatisation requirements for new and returning workers, and early recognition of heat-related symptoms. It also defines the roles and responsibilities of supervisors, workers and first aiders, provides guidance on using tools such as the Wet Bulb Globe Temperature (WBGT) or heat index, and sets out escalation steps when conditions become unsafe. By adopting this procedure, businesses create a documented, defensible approach to managing heat stress that supports compliance with Australian WHS law, reduces the likelihood of serious incidents, and promotes a culture of proactive health protection.

Key Benefits

• Reduce the risk of heat stress, dehydration and heat-related illness across all hot-weather tasks.
• Ensure a consistent, defensible approach to managing heat exposure in line with Australian WHS duties.
• Improve worker wellbeing, comfort and productivity during hot and humid conditions.
• Standardise hydration, rest break and shade requirements so supervisors can make clear, confident decisions.
• Support early identification and response to heat-related symptoms, minimising the chance of medical emergencies.

Who is this for?

• Site Supervisors
• WHS Managers
• Health and Safety Representatives (HSRs)
• Construction Project Managers
• Operations Managers
• Facilities and Grounds Maintenance Managers
• Supervisors of Outdoor Work Crews
• Mining and Resources Supervisors
• Manufacturing and Warehouse Managers
• Agricultural and Horticultural Crew Leaders
• Event and Venue Operations Managers
• Labour Hire Providers

Hazards Addressed

• Heat stress and heat exhaustion from working in high temperatures or direct sunlight
• Heat stroke resulting from prolonged or intense heat exposure
• Dehydration due to inadequate fluid intake during work
• Exacerbation of pre-existing medical conditions (e.g. cardiovascular issues) due to heat
• Reduced alertness and decision-making capacity leading to secondary incidents (e.g. slips, trips, falls, equipment misuse)
• Thermal discomfort and fatigue affecting manual handling and equipment operation
• Electrolyte imbalance from excessive sweating without appropriate rehydration

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions (Heat Stress, Dehydration, WBGT, Acclimatisation, High-Risk Work)
• 3.0 Roles and Responsibilities
• 4.0 Applicable Legislation, Standards and Guidance
• 5.0 Hazard Identification – Heat Sources and High-Risk Tasks
• 6.0 Heat Risk Assessment Methodology (including WBGT/heat index use)
• 7.0 Control Measures – Hierarchy of Controls for Heat
• 8.0 Hydration Requirements and Fluid Intake Guidelines
• 9.0 Work-Rest Regimes and Break Scheduling by Heat Level
• 10.0 Acclimatisation of New and Returning Workers
• 11.0 PPE, Clothing and Sun Protection Considerations
• 12.0 Monitoring Workers for Signs and Symptoms of Heat Stress
• 13.0 Response to Heat-Related Illness and First Aid Procedures
• 14.0 Triggers for Work Modification, Rescheduling or Cessation
• 15.0 Communication, Training and Worker Consultation
• 16.0 Record Keeping, Reporting and Review
• 17.0 Continuous Improvement and Procedure Review

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Guidance Material: Managing the work environment and facilities
• Safe Work Australia – Guide for managing the risks of working in heat
• Safe Work Australia – Code of Practice: Managing the work environment and facilities
• Safe Work Australia – Code of Practice: How to manage work health and safety risks
• AS/NZS 45001:2018 Occupational health and safety management systems – Requirements with guidance for use