One of the challenges is that the decline in water in southern regions is not solely climate driven - even if we froze the climate as it is right now, ground wa

One of the challenges is that the decline in water in southern regions is not solely climate driven - even if we froze the climate as it is right now, ground water sources are being overdrawn (from the article for example, Cyprus is overdrawing ground water by 40%, but rainfall is only down 17% since 1900), and so we would expect regions to face agricultural collapse faster than climatic zones shift north. So far, climatic zone shifts are on the order of 10-100km per decade. https://e360.yale.edu/features/redrawing-the-map-how-the-worlds-climate-zones-are-shifting https://e360.yale.edu/features/redrawing-the-map-how-the-wor...