More than 102,500 people have been affected as of 9 am Monday after Typhoon Kajiki lashed China's southern Hainan Island with torrential rain and gusts, officials say. No fatalities have been reported.

China's national observatory activated a yellow alert -- the third-highest level in its four-tier color-coded weather warning system -- for Typhoon Kajiki, forecasting gales and rainstorms in the nation's southern and southwestern regions through Tuesday.

The National Meteorological Center (NMC) reported that Typhoon Kajiki was positioned in the southern Beibu Gulf waters, moving west-northwest at 15-20 km/h with expected landfall in coastal Vietnam.

READ MORE: South China island province activates highest alert as Typhoon Kajiki nears

Though the storm's geometric center did not make official landfall, part of its eye moved over the city of Sanya, with impacts equivalent to a direct hit.

All districts in Sanya recorded wind gusts exceeding scale 14. A maximum gust of 55.4 m/s (scale 16) was recorded in Haitang district. Meanwhile, Lingshui Li autonomous county, close to Sanya, recorded a gust of 35.5 m/s (scale 12), the second strongest in its history.

According to Wu Zhanchao, deputy head of the Department of Emergency Management of Hainan province, Typhoon Kajiki, the 13th this year, passed near the coast from Sanya to Ledong Li autonomous county late Sunday.

The storm caused significant disruptions to communications, fuel supply and urban services. As of 8 am Monday, one provincial transmission line in Qiongzhong county was interrupted, and 2,722 base stations were out of service - mainly in southern cities and counties including Sanya, Lingshui, Ledong and Baoting - affecting 45,142 fixed-line users and 15,345 mobile users.

About 22 gas stations across the province suspended operations, though most are expected to resume supply shortly. Aviation fuel supply remained normal.

Several cities and counties, including Sanya, and Wuzhishan, experienced road closures, interruptions to water and power supplies, communication outages, fallen trees and localized flooding. In Sanya alone, more than 20,000 trees were uprooted or damaged, one residential complex was flooded, and water supply was cut for over 7,000 households - with more than 5,000 still without service as of Monday morning.

Ledong reported 13 villages without water and a hospital basement flooded. While Lingshui saw over 20,000 trees toppled and 658 communication base stations down.

Post-typhoon recovery efforts are underway.

READ MORE: Tropical storm Kajiki: T1 signal in force at least till 9 am Sunday, says HKO

Due to its impact, from 2 pm Monday to 2 pm Tuesday, strong winds will affect the western part of the South China Sea and waters near Xisha Islands, Beibu Gulf and Qiongzhou Strait, as well as the coastal areas of Guangxi and Guangdong.

During the same period, Yunnan, Guangdong, as well as the Guangxi Zhuang autonomous region, will experience heavy rains and rainstorms, according to the NMC.

The NMC urged local authorities to implement emergency preparedness measures for the typhoon, and potential flooding and geological disasters triggered by the heavy rainfall.