As Water Scarcity is a huge issue that needs to be fixed there can be many ways to fix this problem. It really own takes time and help from those people that are actually the problem. We are the problem and if we don't fix it then it's just going to get worse.
Now this Chart shows how much water is used beyond all the regions. It shows that most of the population's water comes from rainfed areas. Most of the water that everyone gets and uses is from the rain. This picture was stated in "Water Scarcity and Future challanges for food prodcution" by Noemi Mancosu.