Typhoon Nina (1975)  Typhoon Nina, known in the Philippines as Typhoon Bebeng, was the fourth-deadliest tropical cyclone on record. At least 229,000 people died after the Banqiao Dam collapsed (in Zhumadian, Henan Province, China) and devastated areas downstream. The collapse of the dam due to heavy floods also caused a string of smaller dams to collapse, adding to the damage caused by the typhoon. A well defined trough line extending southeastward into the Philippine Sea spawned a disturbance on July 29. After its initial status as a disturbance, Tropical Depression 04W was designated and moved southwestward for 36 hours as the structure of the system began to organize. On July 31, the depression slowed and began to rapidly intensify, becoming a tropical storm and was named "Nina". It began to turn to the northwest afterward. A subtropical ridge prevented Nina from turning further north and it began to track west-northwest just before reaching typhoon intensity. Nina underwent explosive development on the late hours of August 1. Aircraft reconnaissance reported a 65 hPa drop of pressure, increasing from a mere 65 kn (75 mph, 120 km/h) to 130 kt (150 mph, 240 km/h) the day after. During that period, it attained its peak intensity of 135 kn (155 mph, 250 km/h). The typhoon began to weaken as it approached Taiwan, making landfall near the coastal city of Hualien as a Category 3 storm with 100 kn (115 mph, 185 km/h) winds. The storm began to weaken as it went across the island's central mountain range, sparing the most populated areas from the eyewall. It entered the Formosa Straits as a weak typhoon, making another landfall near Jinjiang, Fujian. After moving northwest and crossing Jiangxi, it turned north on the night of August 5 near Changde, Hunan. A day later, the storm moved over Xinyang, Henan, and was later blocked by a cold front near Zhumadian, Henan for three days. The stationary thunderstorm system brought heavy rainfall, causing the infamous collapse of the Banqiao Dam. The storm moved southwest on August 8, and dissipated soon afterwards. Upon making landfall in Taiwan, the storm brought winds of 185 km/h (115 mph) to places near the storm's eye. Wind gusts were also measured up to .