Typhoon Damrey originated as a tropical depression over the Philippines on October 31, 2017. Damrey intensified while moving westward over the South China Sea and became a typhoon on November 3, 2017. Typhoon Damrey hit Vietnam's south central coast the next day with sustained winds of about 75 kts (~86 mph). Torrential rainfall led to deadly flooding. As much as 580 mm (22.8 inches) of rain was reported near the coast well north of where typhoon Damrey came ashore. The Vietnamese government reported that Damrey was responsible for 89 deaths.
Typhoon Lan caused flooding, landslides and the death of at least seven people when it hit Japan early Monday morning. The powerful typhoon was accompanied by high winds and extremely heavy rainfall. Rain totals of 800 mm (31.5 inches) were reported in parts of south central Honshu. Wind speeds of over 106 kts (121.9 mph) were also reported.
Two powerful typhoons have hit the Philippines in less than a week. The first was Typhoon Sarika (known as Karen in the Philippines) that formed east of the Philippines on October 12, 2016. Sarika intensified and had peak sustained winds of 115 kts (132 mph). This wind speed made it the equivalent of a category four on the Saffir-Simpson hurricane wind scale. Sarika made landfall in the Philippines on Sunday in the northern province of Aurora on the island of Luzon. Three people were killed as Sarika pounded the Philippines with heavy winds and flooding rainfall.