the Yellow River. The city became part of the short-lived Pingyuan Province before eventually being annexed into Henan. The capital was also moved from Baoding to the new city of Shijiazhuang, and, for a short period, to Tianjin. On July 28, 1976, Tangshan was struck by the Tangshan earthquake, the deadliest earthquake of the 20th century, killing over 240,000 people. There were a series of smaller earthquakes in the following decade. Today, Hebei, along with Beijing and Tianjin municipalities which it includes, make up the Jing-Jin-Ji megalopolis region. With a population of 130 million, it is about six times the size of the New York metropolitan area and is one of the largest megalopolis clusters in China. Beijing had also unloaded some of its non-capital functions to the province with the establishment of the Xiong'an New Area, which integrates the three municipalities. Geography Hebei is the only province in China to contain plateaus, mountains, hills, shorelines, plains, and lakes. Most of central and southern Hebei lies within the North China Plain. Western Hebei rises into the Taihang Mountains (Taihang Shan), while the Yan Mountains (Yan Shan) runs through northern Hebei. Beyond the mountains are the grasslands of Inner Mongolia. The highest peak is Mount Xiaowutai in Yu County in the northwest of the province, with an altitude of . Hebei borders the Bohai Sea on the east. The Hai River watershed covers most of the province's central and southern parts; the Luan River watershed covers the northeast. Excluding manmade reservoirs, the largest lake in Hebei is Baiyangdian, located in Anxin County, Baoding. Major cities in Hebei include: Shijiazhuang, Baoding, Tangshan, Qinhuangdao, Handan, and Zhangjiakou. Hebei has a monsoon-influenced humid continental climate. Its winters are cold and dry, while its summers are hot and humid. Temperatures average in January and in July. The annual precipitation ranges from , concentrated heavily in summer. Government The politics of Hebei is structured in a dual party-government system like all other governing institutions in mainland China. The Governor of Hebei is the highest-ranking official in the People's Government of Hebei. However, in the province's dual party-government governing system, the governor has less power than the Hebei Chinese Communist Party Provincial Committee Secretary (CCP Party Chief). Administrative divisions Hebei has eleven prefecture-level divisions. All are prefecture-level cities: These eleven prefecture-level divisions are subdivided into 168 county-level divisions (47 districts, 21 county-level cities, 94 counties and 6