"Higher temperatures increase evaporation, and warmer air can hold more moisture. This means more water in the atmosphere and larger storms, which in turn leads to wetter wet seasons, dryer dry seasons, bigger floods, and longer deeper droughts. " This statement is correct as far as more rain and bigger floods go, but it is irrational in the extreme to suggest that more water in the atmosphere causes dryer dry seasons and longer droughts. More water means more rain which means less dry, and less droughts. In the last interglacial when the average temperature was 3 degrees warmer than today, there were rainforests in the Sahara and in central Australia. Droughts and deserts are caused by lower temperatures, and less water in the atmosphere.
Even if this were not true, 2/3 of the planet is covered with water, the very thing that is supposed to be in short supply! Solution: desalination plants.