JOHANNESBURG (Reuters) – Floods have killed more than 400 and caused at least 10 billion rand ($684.58 million) in damage in KwaZulu-Natal (KZN), a senior provincial official said on Sunday, as rescuers hunted for the missing and more rain was expected. The floods have left thousands homeless, knocked out power and water services and disrupted operations at one of Africa’s busiest ports, Durban. Ravi Pillay, a KZN official responsible for economic development, tourism and environmental affairs, said that in addition to just over 400 deaths, about 40 to 50 people were unaccounted for. Referring…