Typhoon Cempaka

Two simultaneous tropical cyclones on July 20, Typhoons Cempaka (left) and In-fa (right).

In Guangdong, 105,000 people were evacuated as Cempaka approached the province. Local authorities ordered the shutdown of 57 coastal tourist destinations, called back 36,280 fishing vessels and asked 16,243 fish-farming workers to be evacuated ashore, according to the provincial emergency management department.[16][14][17] The city of Yangjiang implemented traffic controls on many roads and issued a red alert for rainstorms. It also called back 384 fishing vessels and asked 2,680 fish-farming workers to be evacuated ashore. Nearly 5,000 people in the city were evacuated to safety. In Guangzhou, the Baiyun International Airport canceled 127 flights and delayed 19 outbound flights by 5:15 pm local time at Tuesday.[18] In Yangxi County, the local transportation bureau dispatched 325 staff and law enforcement personnel, inspected 120 vehicles to carry out typhoon rescue, road clearance and traffic diversion, and cleared more than 80 roadblocks. A total of 20 houses were damaged, of which 7 were severely damaged and 13 were partially damaged, along with some road traffic facilities. In total, economic losses totaled $4.25 million in the county.[19]

Cempaka as a tropical storm on July 19

The Hong Kong Observatory (HKO) issued a Signal No. 1 alert on July 18, at 9:40 PM local time (01:40 UTC), as Cempaka was located within 800 km away from Hong Kong.[20] The following day, a Signal No. 3 alert was further issued by the observatory, at 4:10 PM local time (08:10 UTC).[21] Amid a Signal No. 3 alert, a 60-year old hiker was found dead following hours of long search and was discovered to have been swept away by flooding after reaching Hero Falls, the police said.[22]

2 people died, each respectively from Vĩnh Long and Cà Mau, due to a house collapse. Furthermore, 137 houses collapsed and 125 roofs were removed. A landslide was also reported on a river bank in Ngọc Hiển District. In Thanh Hóa, the district experienced heavy rain due to the influence of Cempaka as a weakened tropical depression. Assessing the complicated flood situation, the district government evacuated 305 households and about 1,400 people to a safer place. Flooding caused some damage in Muong Lat. On the afternoon of July 23, floods passed through Quang Chieu commune, sweeping away a temporary bridge that connected Pung village to three hamlets, Suoi Tut and Con Dao villages, which made it difficult for nearly 180 households to travel. The government has sent people to guard, not allowing people and vehicles to pass.[23] The city of Lào Cai experienced torrential rains, submerging many roads, streets and caused hundreds of households to be flooded.[24]

In the Philippines, the system enhanced the prevailing southwest monsoon, together with In-fa (locally known as Fabian). As a result, heavy rainfall warnings were issued by the PAGASA for Metro Manila and several other provinces nearby.[25] In Macau, the Macao Meteorological and Geophysical Bureau (SMG) hoisted a Signal No. 3 alert at 2:30 pm and remained in effect throughout the rest of the day.[26] The managing director who oversees the Xayaburi Dam in Laos, which reflected the volumes discharge from the Mekong River that ran through the power plant, stated that the flow rate was 8,000 cubic metres per second, an increase from the average of 3,588 cubic meter per second during the period from July 1–24, with the rise being attributed to Cempaka.[27]