Syllabus: Environment
Source: DTE
Context
The WHO–WMO report Climate Change and Workplace Heat Stress (2025) highlights how rising global temperatures are creating a severe occupational health and productivity crisis. With 2024 the warmest year on record (1.45°C above pre-industrial levels), both outdoor and indoor workers face growing risks.
Key Findings of the WHO–WMO Report
- Productivity Losses – Each 1°C rise in WBGT above 20°C reduces productivity by 2–3%; sun exposure adds another 2–3°C
- Scale of Exposure – Over 4 billion workers affected; annually 22.85 million injuries, 18,970 deaths, and 2.09 million DALYs linked to heat stress.
- Geographical Hotspots – 30% of the world’s population faces heat stress as an everyday or seasonal problem, with South Asia, Middle East, and Sub-Saharan Africa worst hit.
- Health Impacts – Over one-third of workers in hot conditions report physiological heat strain. WHO guidance (1969) states that core body temperature should not exceed 38°C during an 8-hour shift, but this is increasingly breached.
- Climate Change Dimension – 40–50°C daytime peaks now frequent, spreading risks beyond tropics; worker fatalities recorded in Europe’s 2023 heatwaves.
Implications
- Public Health Strain – Heat stress raises risks of heat stroke, kidney disease, and cardiovascular collapse. India’s brick kiln workers, who often start before sunrise to avoid peak heat, still suffer dehydration, dizziness, and lost wages due to shortened work hours.
- Economic Productivity Loss – ILO projects 34 million jobs equivalent could be lost in India by 2030 in agriculture and construction; developing economies face GDP shrinkage.
- Social Inequality – The poor, migrant labourers, and women workers disproportionately bear the risks due to lack of safeguards, e.g., Gulf migrant construction deaths.
- Climate Justice Challenge – Countries contributing least to emissions, like Bangladesh and Sub-Saharan Africa, endure the harshest impacts, worsening global inequity.
- Food Security Risks – Declining agricultural labour productivity threatens crop cycles and farmer incomes, compounding hunger and malnutrition in vulnerable regions.
- Legal and Institutional Burden – Rising cases of occupational illness may overwhelm compensation systems and labour courts, exposing gaps in occupational safety laws.
What can be done?
- Occupational Heat Action Plans: Cities should adopt early warning systems, reschedule work timings, and train communities.
Example: The Ahmedabad Heat Action Plan (India) provides heat alerts, shaded shelters, and worker training, reducing mortality during heatwaves.
- Infrastructure & Technology: Cooling shelters, shaded work zones, hydration points, and mechanisation can reduce manual strain.
Example: Bangladesh garment sector pilots introduced low-cost ventilation and cooling fans in factories, cutting worker fatigue.
- Labour Policy Reforms: Enforce heat-index-based work-hour regulations, paid rest breaks, and compensation for heat-linked illnesses.
Example: Qatar’s labour law bans outdoor work from 10 am–3:30 pm during peak summer, ensuring rest breaks in shaded areas.
- Public Health Measures: Regular health screenings, hydration protocols, and recognition of heat stress as an occupational disease.
Example: US OSHA’s “Water–Rest–Shade” campaign institutionalises mandatory hydration and rest periods in outdoor industries.
- Global & National Coordination: Mainstream heat stress into ILO conventions, COP climate talks, and SDG frameworks, with adaptation finance for vulnerable economies.
Example: Australia’s workplace safety standards integrate climate projections for mining and agriculture, making them future-ready.
Conclusion
Extreme heat is no longer only an environmental challenge but a core labour rights and economic resilience issue. Safeguarding workers through heat-adaptive policies and best practices is vital to protect health, productivity, and dignity in a warming world.
