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Study warns that cities will face droughts and floods due to rising temperatures

Study warns that cities will face droughts and floods due to rising temperatures

A study commissioned by WaterAid on Wednesday showed that the weather in many of the most densely-populated cities around the world is changing from droughts to flooding and back again, as rising temperatures disrupt the global water cycle.

Researchers found that South and Southeast Asia are experiencing the most wet weather, while Europe and the Middle East, as well as North Africa, are getting drier. The study was based on 42 years' worth of data from over 100 of the largest cities in the world.

Michael Singer, Water Research Institute at Cardiff University and one of the study's authors, said that there will be winners as well as losers in climate change. It's already happening.

The study found that the eastern Chinese city of Hangzhou, and the Indonesian capital Jakarta were the two cities most affected by "climate whiplash" or a rapid successions of long-lasting floods and dry spells.

The Texan city Dallas, Shanghai, China's commercial capital, and Baghdad in Iraq, which is the capital, are all cities that face extreme flooding and drought at the same time.

Singer added, "You cannot assume that all places will have the same response to atmospheric heating." It doesn't matter if you're rich or poor, or if you have a great infrastructure or no.

Hangzhou, a coastal city in China, set a new record for extreme temperatures with over 60 days last year. It was also hit hard by severe flooding that forced thousands to flee.

The climate has changed in five cities. Colombo, the capital city of Sri Lanka, and Mumbai, the financial center of India, have "flipped" and become much wetter, while Cairo, the Egyptian capital, and Hong Kong, are becoming steadily dryer.

Singer warns that many cities who built infrastructure to maximize scarce water supplies or to mitigate flood damage now face entirely different situations and will need to adjust to them.

Tokyo in Japan, London, and Guangzhou in southern China are among the few places that have seen positive changes. From 2002 to 2023, there were significantly fewer months of rain and drought than the previous two decades. (Reporting and editing by Clarence Fernandez; David Stanway)

(source: Reuters)