Authorities in Hebei raised the natural disaster emergency response level to II from III, while Beijing kept a warning in place for landslides on its outskirts. Floodwaters could take up to a month to recede in Hebei, where Zhuozhou is the hardest-hit city, a water resources department official told state media on Thursday. So far, about 100,000 people in the city, south-west of Beijing, had been evacuated, or a sixth of its population. China has long been aware of urban waterlogging risks, with rapid urbanisation in recent years creating metropolitan sprawls that covered floodplains with concrete. Extreme weather driven by...