Typhoon Megi, known in the Philippines as Typhoon Helen, was a large and powerful tropical cyclone which affected Taiwan and eastern China in late September 2016. It is the seventeenth named storm and the seventh typhoon of the annual typhoon season. Megi started as a tropical disturbance in the northeast of Pohnpei. On September 21, JMA upgraded the disturbance to a tropical depression. The depression was immediately named Megi by the JMA as it was classified as a tropical storm. It was later then designated by JTWC as a newly formed Tropical Depression 20W. Moving northwestwards, Megi was trying to form an eye which prompted the agencies to upgrade into a typhoon. Megi later entered PAR, attaining the name Helen as it continued to intensify. Favorable conditions and low vertical wind shear allow Megi to perform an eyewall replacement cycle as it approaches Taiwan.

Typhoon Longwang, known in the Philippines as Typhoon Maring, was the deadliest tropical cyclone to impact China during the 2005 Pacific typhoon season. Longwang was first identified as a tropical depression on September 25 north of the Mariana Islands. Moving along a general westward track, the system quickly intensified and reached typhoon status on September 27. After reaching Category 4-equivalent intensity on the Saffir–Simpson hurricane scale, adverse atmospheric conditions along with internal structural changes resulted in temporary weakening. The structural change culminated in Longwang becoming an annular typhoon and prompted re-intensification. The storm attained peak strength with winds of 175 km/h (109 mph) and a pressure of 930 mbar on October 1 as it approached Taiwan. Interaction with the mountainous terrain of the island and further structural changes caused some weakening before the typhoon made landfall near Hualien City early on October 2. Crossing the island in six hours, Longwang emerged over the Taiwan Strait before moving onshore again later that day, this time in Fujian Province, China as a minimal typhoon. Once over mainland China, the storm quickly weakened and ultimately dissipated late on October 3.