A city rivalry is heating up between Shanghai and Chengdu. The highest temperatures and lowest rainfall since records began 60 years ago have led to severe power shortages across the south-western province of Sichuan, where Chengdu is located, and in its neighbouring municipality, Chongqing. As a result Sichuan has been forced to curb energy use at thousands of industrial firms. That in turn has threatened the supply of parts to carmakers, such as Tesla in Shanghai.
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