As temperatures soar across India, experts warn that the impact of El Niño and long-term climate change is intensifying heatwaves and disrupting weather patterns. Rising Pacific Ocean temperatures associated with El Niño are contributing to extreme heat and irregular monsoon conditions across South Asia. Environmentalists and climate experts say rapid urbanisation is worsening the crisis. Expanding concrete infrastructure, shrinking green cover and poor urban planning are creating heat-trapping environments that keep cities hot even after sunset, increasing health risks for millions. Experts are calling for long-term heat action plans focused on cooling infrastructure, shade, water availability and protection for vulnerable populations, particularly outdoor and informal workers. They warn that India's challenge now extends beyond daytime heat to increasingly dangerous nights and growing climate stress.