BEIJING (Reuters) - Temperatures in northern China are set to plunge as much as 20 degrees Celsius (68 Fahrenheit) after summer-like conditions in the final days of autumn, state forecasters said on Friday, extending a year-long trend of unusual swings in the weather. Parts of northern China posted record high temperatures of more than 30C earlier this week, while also suffering widespread smog. Extreme weather has become more pronounced in China this year, destroying urban infrastructure as well as farmland, leading to hefty economic losses. In the summer, typhoons dumped historic rainfall in parts of inland China less used to tropical storms. Earlier in spring, northern China basked in unseasonal heat with temperatures reaching summer-levels.

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Persons: Doksuri, Ethan Wang, Ryan Woo, Simon Cameron, Moore Organizations: National Meteorological Administration, CMA Locations: BEIJING, China, Mongolia, Xinjiang, Beijing, Tianjin, Hebei province, Mohe