Water is a serious problem everywhere. A few instances I have seen talked about in the last few months.
Melting in the Himalayas, currently taking place, is affecting rivers in India and Pakistan. Agriculture, industry and cities will be hurt. (Downstream rains and floods are not helpful).
The Tigris-Euphrates system and others in the Middle East are reduced, cutting into agriculture.
Water use by Israel has made a viable agriculture by Palestine impossible (Palestine is an impossible dream anyhow).
Growing southwest US populations are making water use a critical issue.
Florida wetlands are diminishing as the population burgeons.

My city of Calgary depends largely on glacial and snow meltwater; glaciers are disappearing and the climate has become drier.