From prolonged heat stress and sleep loss to rising "climatic suitability" for dengue and malaria transmission, climate change is posing a growing range of health risks to Indians, according to the '10th Lancet Countdown on Health and Climate Change Report' released on Wednesday. Half of India s heatwave days in 2016 2025 were attributable to climate change, while rising heat exposure, infectious disease risks and air pollution are taking a growing toll.