Underground and enclosed workspaces such as tunnels, basements, mines, engine rooms, and confined industrial sites pose serious risks when it comes to heat stress. Without sufficient airflow and ventilation, heat can quickly build up to dangerous levels, leading to heat-related illnesses and reduced worker productivity. Recognising the unique challenges of these environments is essential to protecting worker health and meeting compliance requirements.
Why Heat Stress Is a Concern in Enclosed Workspaces
Heat stress occurs when the body cannot cool itself effectively, leading to a rise in core temperature. In underground and enclosed settings, several factors amplify the risk:
- Limited ventilation
- Radiant heat from machinery
- Restricted airflow and humidity build-up
- Protective clothing that traps heat
According to Safe Work Australia, working in hot and poorly ventilated areas increases the likelihood of heat exhaustion, heatstroke, and long-term cardiovascular issues if not managed properly.
Industries Most at Risk
- Mining and tunnelling
- Wastewater and sewer maintenance
- Underground transport systems
- Boiler and engine rooms
- Construction sites with enclosed scaffolding or sheeting
In many of these industries, heavy PPE (personal protective equipment) is required, further reducing the body’s ability to release heat.
Engineering and Administrative Controls
The hierarchy of control for managing heat stress recommends starting with engineering controls. These include:
- Ventilation and air conditioning
- Heat shields or reflective barriers
- Insulated tools and machinery to minimise radiant heat
- Scheduling work during cooler hours
- Job rotation to reduce individual exposure
The Australian Institute of Occupational Hygienists also recommends using monitoring tools to measure Wet Bulb Globe Temperature (WBGT) and adjust work-rest cycles accordingly AIOH, 2022.
The Role of Personal Cooling Solutions
In settings where environmental controls are limited, personal cooling gear becomes a critical line of defence.
Arctic Heat Cooling Vests in Enclosed Workspaces
Arctic Heat Cooling Vests are specifically designed to regulate body temperature under extreme heat conditions. The polymer gel technology absorbs body heat and provides prolonged cooling without requiring electricity or bulky systems.
These vests have proven effective for:
- Mine workers wearing full PPE
- Maintenance crews in underground utility tunnels
- Engine room operators during the summer months
- Emergency responders in confined rescue operations
Best Practices for Worker Safety
- Conduct heat risk assessments regularly
- Provide cooling gear for all high-risk personnel
- Train workers to recognise early symptoms of heat stress
- Ensure hydration stations are easily accessible
- Use a buddy system in confined areas to monitor for heat-related symptoms
- Log temperature and humidity levels continuously in enclosed sites
WorkSafe Queensland notes that heat-related productivity losses can reach up to 20% in very hot conditions, reinforcing the need for proactive management.
Heat stress in underground and enclosed work environments is a serious occupational hazard. With rising temperatures and increasing demands on the workforce, it’s vital to implement both systemic and personal-level controls. Arctic Heat cooling solutions provide an effective, lightweight, and non-restrictive option to manage personal heat load where traditional cooling systems are unavailable.
By combining proper planning, workplace monitoring, and reliable cooling gear, employers can protect their teams and maintain safe, compliant, and productive work environments. Shop here.
