Final answer:
The reference material does not specify which city will be the first to run out of water, but several are at risk of severe droughts, including Delhi, Lagos, and cities in the Middle East and sub-Saharan Africa. By 2025, the water crisis is expected to affect more than 3 billion people, with adaptation strategies varying by region.
Step-by-step explanation:
The first major city anticipated to run out of water is not explicitly mentioned in the reference material provided. However, several major metropolitan areas are projected to face moderate to severe droughts by the end of the 21st century, with a notable mention of Cape Town in South Africa facing severe water shortages in recent years. The problem of water scarcity is significantly impacting sub-Saharan Africa, Asia, and the Middle East.
Cities like Delhi, India; Los Angeles, United States; and Lagos, Nigeria are among those expected to face challenges with their water supplies. According to the United Nations Development Programme, more than 3 billion people could live in water-stressed areas by 2025, intensifying the water crisis globally.
As climate change continues to affect the availability of fresh water, the world may see increased conflicts over water resources, affecting food production, public health, and social stability. Select cities are implementing various adaptation strategies like rainwater harvesting, water re-use, and desalination to combat this dilemma.