With water crises already plaguing many of the world’s cities, WWF’s new water risk scenarios estimate that hundreds of millions of people in cities across the globe could face dramatically increased water risks – unless urgent action is taken to mitigate and adapt to climate change. According to the scenarios in the WWF Water Risk Filter, the 100 cities that are expected to suffer the greatest rise in water risk by 2050 are home to at least 350 million people as well as nationally and globally important economies. Globally, populations in areas of high-water risk could rise from 17% in 2020 to 51% by 2050.