The Biggest potential problem for mankind from Global Climate changes are the Winds on into the future

 You might say: "NO! It's flooding! And yes you are partly right as well as extreme droughts in some areas as well."

However, think about this: "If winds are 300 to 500 miles an hour where you live even for one day of the year that will blow away most trees and all plants including anything you are growing if it is above ground and exposed to the winds."

At that point people will have to grow more and more underground like Marijuana farmers used to and still do. So, the grow lights and all that (solar powered Grow lights) and solar powered water pumps to feed both power to the grow lights and power to the solar powered water pumps for trickle watering would be necessary too. So, any sunny day would bring grow lights on and water to the plants you need to grow to eat to survive.

This is coming later this century. For now, the sporadic Random nature of areas of earth being destroyed for humans temporarily or permanently is very unpredictable. However, as there are more and more areas destroyed for growing food this is going to be more and more of a problem ongoing. So, be prepared for this because it is coming (though it is true that some areas of earth will be more affected by this than others ongoing in a completely random sort of way.