The Delhi government's defense of Chief Minister Rekha Gupta's claim that evaporation contributes to the city's water shortage has ignited a debate over the actual impact of heat on urban water supply systems. Gupta's assertion suggests that extreme summer temperatures lead to increased evaporation, particularly affecting open water bodies. Critics, including opposition parties, argue that this perspective oversimplifies the multifaceted nature of Delhi's water crisis. While evaporation can indeed cause measurable losses in open systems, experts emphasize that structural issues, such as mismatched supply and demand, distribution inefficiencies, and groundwater over-extraction, are the primary drivers of water shortages. Studies indicate that in modern urban infrastructure with covered pipelines, evaporation losses are minimized. Therefore, while Gupta's claim has a basis in scientific fact, it fails to capture the broader context of Delhi's ongoing water challenges, where evaporation is only one of several contributing factors to the crisis.