The Asian financial hub of Hong Kong and the Chinese province of Guangdong cancelled hundreds of flights and evacuated nearly 800,000 people Friday as the imminent arrival of Typhoon Saola forced closures of businesses, schools and financial markets.

Packing winds of around 200 kph (125 mph), the super typhoon could make landfall late on Friday or early on Saturday in Guangdong, and rate among the five strongest to hit the populous province since 1949, authorities have warned.