By Akash Yadav, AIDMI, India

Rising temperatures and more frequent heatwaves are pushing India’s outdoor and factory workers into dangerous conditions. Heat stress layered on physically demanding labour elevates the risk of heat exhaustion, heatstroke, and long-term cardiovascular strain, hurting both health and productivity. Yet current labour protections are too generic to keep pace with climate realities.

What the Data Shows (PLFS 2023 + MET)

Using PLFS 2023 and Metabolic Equivalent of Task (MET) standards, occupations were classified by exertion and exposure:

• Scope of exposure: 38% of NCO occupations (192 of 506) involve heat (outdoor work or hot factory floors). Examples: construction, agriculture, street vending, metal foundries, brick kilns, and glass manufacturing.
• Within heat-exposed jobs:
  • 52% are moderate intensity (MET 3–6): sustained activity with breaks (e.g., security guards, farm supervisors, transport workers). Risks: dehydration, heat exhaustion, cumulative strain.
  • 29% are heavy intensity (MET >6): continuous high exertion (cultivators, construction/mining labourers) with acute heat-illness risk.
• Contrast (non-heat jobs): only 7.3% require heavy labour; 68.2% are light intensity—showing the disproportionate heat burden on outdoor/factory workers.

India’s current regulatory framework does not treat heat as a core occupational hazard. The Factories Act, 1948, lacks explicit mandates for cooling measures, hydration stations, or rest schedules calibrated to thermal stress, and Section 55’s 30-minute break after five hours is not heat-specific. Compounding these shortcomings, there is no national system to track heat-related illnesses, which obscures the true burden on workers and hinders targeted interventions.

Policy Actions

For moderate-intensity work (MET 3–6), protections should focus on reducing cumulative heat load through frequent, guaranteed hydration breaks with ubiquitous access to potable water; ventilation and shading upgrades at worksites; and a shift to breathable, heat-appropriate PPE. Scheduling should avoid peak heat by moving starts earlier, splitting shifts, or instituting a deliberate midday slowdown, allowing the body to recover while maintaining productivity.

For heavy-intensity work (MET >6), stronger, time-bound controls are essential. Employers should provide mandatory cooling breaks in shaded or actively cooled rest areas and trigger temperature-based task rotation or temporary stoppages once safe thresholds are exceeded. Sites must be prepared for acute incidents with trained responders, first-aid supplies, and rapid referral protocols. Given the sustained high risk in sectors such as construction, metal foundries, and brick kilns, India should evaluate and adopt clear, sector-specific temperature thresholds modelled on global best practices.

Enforcement That Works

Effective enforcement means making heat risk management routine, measurable, and transparent. Heat audits should be integrated into regular labour inspections using clear checklists that verify temperature-safety thresholds, hydration access, shaded rest areas, and ventilation standards. Inspectors of the PLFS Data need training to identify heat hazards and confirm tangible evidence, such as break logs, water availability, and the presence and functioning of cooling infrastructure, while public compliance dashboards can create reputational pressure and help authorities target seasonal hotspots for intensified oversight.