As we know and can see Madrid has various and important problems with Water, if these problems dont stop and no solutions are found or put into action, worse future problems or long term effect of those problems will occur. To Future Problems we can state, the Desertification, less Facilities to Life and severe Contamination problems.
Desertification will be a forward state of the possible Drought given in Madrid due to the rain, the desertification will be an extreme circumstance which can be given, they say in around 20 years half of Spain will be deserted due to the extense amount of tropical winds from Africa containing Sand. So if even sand comes and if rain doesnt eventually an extreme circumstance will give the Desertification.
Less Facilities to Life will occur due to the problems which can occur with the amount of water available in the dams or resevoirs if the rain doesnt come or exteranl help (water). People will suffer to clean themselves, to have water to cook or even drink.
Contamination, if in these proximate years rain doesnt approach in an average amount which will take away the contamination in Madrid, Madrid will have a severe problem with the pollution which would huddle up in the city making all citizens lifes day even more uncomfortable.
But as we all know Madrid is a developed city, which if due to problems with water will have enough resources to overcome these problems and I think for all citizens Madrid will not enter the desertification for example.