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Why a 4-Degrees World Won't Cause Just One Water Crisis

Julia Bucknall's picture
Also available in: Français
There is much talk of a water crisis. We who work in water don't really see just one; we see lots of different water crises already now, getting worse as we move towards 2 and eventually 4 degrees above pre-industrial temperatures. Floods in some places, droughts in others, poor operation and maintenance making infrastructure unable to protect citizens in some places, lack of enforcement of rules leading to pollution crises or rampant overuse of groundwater in many others. So there are lots of water crises, some caused by nature, some by humans and most some a combination of the two.

What Does Water Look Like in a 4-Degrees World?

Julia Bucknall's picture

Turn Down the Heat report

All climate negotiations have been based on staying below 2°C above pre-industrial temperatures. Yet it looks increasingly unlikely that that will be possible. A new report, Turn Down the Heat: Why a 4°C Warmer World Must be Avoided, suggests that there is a 40 percent chance that we will reach 4°C by 2100 even if we stick to the agreed emission reduction commitments.

What does water look like in a 4°C world?

Put simply: it's complex. Water is a complicated system and one of the major impacts of climate change is the effect on the hydrological (water) cycle.  These impacts will coincide with an unprecedented increase in demand for water because of population and economic growth.