This week’s Climate Matters visualizes how much warming is expected by the end of the century in the world’s largest cities. The research expands our previous U.S. Shifting Cities temperature analysis to the rest of the world. These shifts in location illustrate how a few degrees of warming during the summer can transport a city to an entirely different temperature zone. That has the potential to alter weather patterns, make extreme heat more common, and affect the health and economic engines that drive those cities.
We project average summer high temperatures at the end of the century and compare them to cities experiencing those same summer temperatures today. For example, summers in London in 2100 will feel more like those in Milan today if greenhouse gas emissions aren’t reduced. Summers in Milan will feel more like current summers in the Egyptian coastal city of Port Said. Moscow will feel like present-day Bucharest, and New Dehli will heat up to present-day Baghdad.
As for Baghdad’s average summer temperatures by the end of the century, they are projected to get so hot that no place on Earth currently matches them. The same is true for several cities in the Middle East, underscoring the reality that climate change is slated to push our world into a state that humans have never experienced.