Aerial photo taken on Aug. 18, 2020 shows boats and vessels at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows boats and vessels at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows boats and vessels at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows fishing boats at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows boats and vessels at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)

Aerial photo taken on Aug. 18, 2020 shows boats and vessels at Xin'gang harbour in the city of Haikou, south China's Hainan Province. Typhoon Higos is expected to bring torrential downpours to regions in southern China in the following days. A tropical depression in the northeast of the South China Sea intensified into a typhoon at around 8 a.m. Tuesday, according to the meteorological department of Hainan Province. The emergency management department of Hainan has issued a typhoon alert, warning that fishing boats and other vessels should return to harbors. (Xinhua/Yang Guanyu)