The rising heat: A new challenge for South-East Asia’s workforce

As temperatures soar and humidity intensifies, South-East Asia faces an escalating challenge: the impact of extreme heat on employees’ health, productivity, and overall wellbeing. Dr David Teo, Regional Medical Director at International SOS, highlighted this growing concern, emphasising that “global warming has amplified the risks posed by extreme heat, particularly in South-East Asia, where rising temperatures and humidity levels are creating significant challenges for employers and employees alike.”

While heat-related illnesses like heatstroke and exhaustion are well-known, the less visible effects on mental health are equally concerning. High ambient temperatures can lead to mental stress, irritability, anxiety, and even aggression. “Heat-related risks extend beyond physical injuries. High ambient temperatures contribute to mental stress, creating a ripple effect that undermines workplace safety and productivity,” he told HRM Asia.

Employees in industries such as construction, agriculture, transportation, and offshore sectors are particularly vulnerable. Prolonged heat exposure reduces concentration and stamina, increasing the likelihood of workplace accidents. Urban environments like Singapore experience the urban heat island effect, where high temperatures persist even at night, disrupting sleep and compounding fatigue.

Dr Teo warned, “Vulnerable groups, such as older employees or those with chronic conditions, are disproportionately affected, highlighting the need for tailored interventions.”

How employers can mitigate heat stress

The International SOS Risk Outlook 2025 report revealed that 55% of organisations globally have been affected by climate-related events, including heat waves. Moreover, 75% of employees expect greater support from their employers.

Dr Teo outlined several proactive measures employers can adopt:

• Education and Awareness: “Employees and managers need to recognise the signs of heat stress and understand its implications,” he stressed. Training programmes should educate employees on recognising symptoms in themselves and their colleagues, as well as the potential long-term effects of prolonged heat exposure.
• Workplace Adaptations: Simple, practical adjustments can make a significant difference. “Simple measures such as shaded areas, work-rest schedules, and adequate hydration facilities can reduce heat-related injuries,” said Dr Teo. Consider implementing flexible work schedules where possible, providing access to cool break rooms, and ensuring readily available drinking water.
• Supporting Vulnerable Group: “High-risk employees, such as older employees or those with chronic illnesses, should be closely monitored,” advised Dr Teo. HR could work with occupational health professionals to identify and support these individuals, potentially through modified work duties or more frequent breaks.
• Leveraging Technology: “Wearable devices and predictive analytics can help prevent heat injuries and ensure operational preparedness during extreme weather events,” he suggested. Investing in technology that monitors environmental conditions and individual physiological responses can help proactively identify and mitigate heat-related risks.

Building long-term resilience

Incorporating climate-related risks into business continuity planning is not just prudent—it is essential. “Failure to act will not only jeopardise employee health but also reduce productivity and erode reputations,” Dr Teo cautioned. Conversely, organisations that prioritise heat management can reduce absenteeism, foster loyalty, and position themselves as leaders in workforce care.

READ MORE: What organisations can do to help employees beat the heat

“South-Easy Asia’s unique vulnerability to heat stress offers an opportunity for regional businesses to lead by example,” he concluded. “By taking decisive action, employers can protect their workforce while ensuring organisational resilience in the face of a warming future.”