Climate change has many signals—rising sea levels, melting glaciers, stronger storms—but the first and most immediate sign for most people on the planet is water. Not too much of it. Not too little.

Water scarcity occurs when a region’s demand for water exceeds its available supply. This challenge is not limited to arid countries—it affects regions across Africa, Asia, the Middle East, and even ...

Your correspondent moderated a panel discussion with global experts in desalination, international development, and water economics at the ceremony announcing the teams that had qualified for the ...