Heavy rainstorms that swept across southern China over the weekend killed at least four people as floods swamped cities in the densely populated Pearl River Delta. In Guangzhou, the capital of Guangdong province, the government said the city had logged a cumulative rainfall of 60.9cm in April, the highest monthly rainfall since record-keeping began in 1959. The country’s highest-level red rainstorm warning was issued for parts of Guangdong, including the megacity of Shenzhen, the city’s meteorological observatory said. The areas listed were experiencing ‘heavy to very heavy downpours’, the weather agency said, adding the risk of flash floods was ‘very high’.