SHANGHAI—Two dams in China’s northwestern region of Inner Mongolia have collapsed after torrential rain, the water ministry said on Monday, highlighting the safety risks posed by ageing infrastructure during the summer flood season. The dams, in the Inner Mongolian city of Hulunbuir, collapsed on Sunday afternoon. They had formed reservoirs with a combined water storage capacity of 46 million cubic metres, the Ministry of Water Resources said. People living downstream were evacuated, with no casualties reported, it said. The ministry said that on average, 87 millimetres of rain fell in Hulunbuir over the weekend and as much as 223 millimetres at the Morin Dawa monitoring station. Extreme weather has hit several parts of the world in recent weeks with flooding in Europe and heatwaves in North America, adding to worries about climate change. Hulunbuir’s city government said on its WeChat account that 16,660 people have been affected, with 53,807 acres …