Answer:
A reduction in rainfall and a dramatic water shortage would be a very difficult event for any region. In this situation, the responses would have to be institutional, social and individual.
Explanation
The institutional response is the responsability of the government. The government would have to look for new water sources, but it would also have to promote more sustainable practices in water management.
Socially and individually, people would be obliged to learn to use less water to carry out their daily activities. They would also have to understand the different mechanisms of water recycling that exist, for example, by obtaining some of the water from rainfall (although if rainfall is too low, this would not be a very effective solution).
In conclusion, the situation would be dire, and this is why people and goverments must focus on prevention of water shortages, not on relief.
Peter Minuit founded the Dutch colony of new amsterdam (new york)
"His Majesty's government view with favour the establishment in Palestine
of a national home for the Jewish people, and will use their best
endeavours to facilitate the achievement of this object, it being
clearly understood that nothing shall be done which may prejudice the
civil and religious rights of existing non-Jewish communities in
Palestine, or the rights and political status enjoyed by Jews in any
other country." basically, it claimed Israel was gonna be the religious sanctuary for all jews and no one can infringe on that right.