India is facing a rapidly intensifying extreme-heat problem that is no longer seasonal in the old sense; it is becoming a recurring, nationwide disruption to health, learning, mobility, and livelihoods. Recent assessments indicate that nearly 57% of Indian districts, home to about 76% of the population, are at high to very high risk from extreme heat, with rising night-time temperatures and humidity making conditions harder to endure and harder for the body to recover from.
This is not only a weather issue. The World Health Organization notes that heat extremes can worsen cardiovascular, respiratory, mental-health, and diabetes-related conditions, and can also contribute to acute kidney injury. For India, the impact spreads across homes without reliable cooling, classrooms, streets, farms, construction sites, delivery work, and public transport. Studies and policy analysis also warn of large productivity losses: WRI India projects that heat stress could reduce annual working hours by 6% by 2030, with major job and income losses.
The problem is severe because it affects people every single summer, hits outdoor workers and low-income families hardest, disrupts school attendance and exam preparation, raises electricity demand, and increases the risk of heat illness in children, older adults, and people with existing health conditions. India’s own health-climate systems now treat heat as a core public-health issue, with the National Centre for Disease Control listing heat-health action plans among its key climate-and-health response areas.