It's going to depend on where you live. It's already real real in my country and there's not really water wars as much as there is a lot of rationing and the state cracking down out of desperation. Parts of the US like the Northeast will face the least issues and people living in certain areas of it can probably live through it all and not face any of the more series issues that other parts of the world will. Their biggest issues will be a dramatic increase in prices for everything, population booms from refugees domestically and internationally, as well as occasional flooding and squalls.