New Delhi, July 22 -- Typhoon Wipha toppled trees and caused major flight disruptions Sunday in Hong Kong and at some nearby airports in China as it moved west off the southern coast of the country.

Airports in Hong Kong, Shenzhen, Zhuhai and the casino hub of Macao canceled or postponed flights for most of the day, according to their websites. Hong Kong grounded at least 400 flights, affecting around 80,000 passengers, broadcaster RTHK said. Some high-speed train services were also suspended.

The typhoon stayed just offshore until about 6 p.m., when it made landfall in a coastal area of Taishan city in Guangdong province, China's National Meteorological Center said. It then weakened to a severe tropical storm with maximum sustained win...