A super typhoon dubbed the 'King of Storms' has struck Hong Kong and southern China, with authorities urging people to stay at home while experts recorded winds of 137 miles per hour.

Hong Kong shut schools and cancelled flights on Tuesday as super typhoon Ragasa - the world's most powerful tropical cyclone this year - neared the financial centre with a force that officials warned would be among the most destructive in the city's recent history.

The powerful storm posed a wide threat to lives and homes, prompting authorities in mainland China to order businesses and schools to shut down in at least 10 cities across the nation's south, affecting tens of millions of people.

People piled into supermarkets, leaving little on the shelves, as panic buying set in and residents stocked up on necessities for fear that shops could be closed for two days.

Ragasa had already toppled trees, torn the roofs off buildings and killed at least two people in a landslide while lashing the northern Philippines, where thousands sought shelter in schools and evacuation centres.