On Thursday, New Delhi experienced its warmest May night in 14 years, with temperatures reaching 31.9°C. Experts warn that such warm nights can pose serious health risks, particularly for vulnerable populations lacking air conditioning. A recent study by Climate Trends, conducted in Chennai, revealed that indoor temperatures peak not during the day but between 8pm and 9pm, as heat from concrete structures is released. This lack of nighttime cooling denies the body its recovery period, leading to health issues like heat exhaustion and exacerbating chronic conditions such as diabetes and hypertension. Dr. Yogesh Jain, a public health physician, noted that without proper cooling, the body's ability to regulate temperature diminishes, increasing the risk of severe health consequences. Vulnerable groups, including the elderly and pregnant women, are particularly affected when nighttime temperatures exceed 24°C. The findings indicate a significant gap in India's heat governance, as the country's 300 Heat Action Plans do not address indoor temperatures, leaving millions without adequate cooling options at night.