Heat stress: Land transport infrastructure sector employers urged to adopt heat measures

Key Concepts

Heat stress management, wet bulb globe temperature (WBGT), heat precautions, hydration, sheltered rest areas, first aid for heat stress, vulnerable worker identification, Singapore Contractors Association, project timelines, data collection, work-rest cycles, body cooling suit, heat resilience, occupational safety, prevention vs. cure, climate impact, individual education, warning signs of heat-related distress, graded warning system, quality and audit system.

Heat Stress Management Guidelines for Land Transport Infrastructure

Authorities are urging the land transport infrastructure sector to enhance heat stress management due to rising temperatures from climate change. The latest guidelines build upon previous measures for outdoor work, specifically targeting workers involved in road works and related activities.

Monitoring and Warning Systems

• Wet Bulb Globe Temperature (WBGT) System: Work sites are advised to install monitoring tools like the WBGT system.
• Warning Signals: If live WBGT readings reach 32 degrees Celsius or higher, amber lights or colored flags should signal warnings, prompting immediate heat precautions.

Preventative Measures

• Hydration: Employers must provide easily accessible and free drinking water facilities with ice or cold drinks. Daily water parades are also recommended.
• Sheltered Rest Areas: Rest areas should be close to work zones to allow workers to quickly access shade.
• Cooling Methods: Air coolers, misting fans, and loose-fitting outfits are recommended to help workers cope with the heat.

Training and Identification

• First Aid Training: Workers should be trained in first aid for heat stress and participate in regular emergency drills.
• Vulnerable Worker Identification: Vulnerable workers can be identified using helmet stickers or wristbands.
• Daily Temperature Checks: Daily temperature checks will help spot early signs of heat stress.

Industry Perspective

The Singapore Contractors Association acknowledges the need to address heat stress management and is working with companies and authorities to promote awareness. However, some contractors are concerned about the impact on project timelines. One representative mentioned that companies might need to factor in the cost of heat stress measures into their contractual billing price.

Expert Opinion: Professor Marcus Ang, Singapore General Hospital

Professor Marcus Ang, Senior Consultant at the Department of Emergency Medicine at Singapore General Hospital, provides expert insights on the measures.

Assessment of Current Measures

Professor Ang believes the latest measures are a "great start," particularly highlighting active monitoring, early warning systems, preventive measures, and the provision of early treatment and first aid.

Areas for Improvement

• Data Collection: He emphasizes the importance of collecting data to understand workplace-related heat injuries.
• Work Adaptations: He suggests considering adaptations to work schedules, such as work-rest cycles and avoiding outdoor work during peak heat hours.
• Treatment Innovations: He mentions his research team at Singapore General Hospital has developed a body cooling suit for both prevention and early treatment of heat-related injuries.

Applicability to Different Work Environments

Professor Ang clarifies that the measures apply even in environments like tunnels or depots, where workers are not directly under the sun, because high ambient temperatures and humidity in confined spaces can still lead to heat stress. He also extends the applicability to other industries like construction, marine, shipyard, and occupations requiring protective gear (e.g., firefighters, healthcare workers).

Addressing Contractor Concerns

Professor Ang argues that "prevention is definitely better than cure" and that effective preventive measures and work adaptations can save man-hours in the long term. He cites the example of shipyards in Dubai, where work is primarily conducted in the evening and night to avoid the hottest part of the day.

Worker Responsibilities

Professor Ang outlines several measures workers can take:

• Education: Understanding the risks and preventative measures.
• Fitness: Ensuring they are fit and well before starting work.
• Hydration: Staying adequately hydrated.
• Clothing: Wearing light, breathable clothing.
• Buddy System: Implementing a buddy system to monitor each other.
• Access to Resources: Ensuring access to shelter, cooling, and first aid.

Warning Signs and Response

Professor Ang reiterates the importance of active monitoring of environmental temperature and humidity using the wet bulb globe, and implementing a graded warning system. He also stresses the need for data collection to track trends and provide feedback to work sites. Finally, he advocates for a quality and audit system to gather employee feedback and react accordingly.

Synthesis/Conclusion

The implementation of comprehensive heat stress management guidelines is crucial for protecting workers in the land transport infrastructure sector, especially in the face of rising temperatures due to climate change. The guidelines emphasize proactive monitoring, preventative measures, training, and adaptation of work practices. While some contractors may have concerns about project timelines, experts argue that the long-term benefits of preventing heat-related illnesses outweigh the short-term costs. Continuous data collection, innovation in treatment, and a focus on worker education are essential for ensuring the effectiveness of these measures.