HONG KONG — Car assembly plants and electronics factories in southwestern China have closed for lack of power. Owners of electric cars are waiting overnight at charging stations to recharge their vehicles. Rivers are so low there that ships can no longer carry supplies.A record-setting drought and an 11-week heat wave are causing broad disruption in a region that depends on dams for more than three-quarters of its electricity generation. The factory shutdowns and logistical delays are hindering China’s efforts to revive its economy as the country’s leader, Xi Jinping, prepares to claim a third term in power this autumn.The ruling Communist Party is already struggling to reverse a slowdown in China, the world’s second lar …
