Throughout both the Albay and Sorsogon provinces, four-fifths of all schools and half of all public infrastructure were destroyed. The rotational wind speed is increasing, but the typhoon's progress across land is slowing down — meaning more time in the danger zone for locals. Source: Public Domain The typhoon slowly decreased in intensity as it approached the island, making landfall near the coastal city of Hualien on 3 August with maximum surface winds of 184 km/h (115 mph). [5] Wind gusts were also measured up to 222 km/h (138 mph). Nina underwent explosive development on the late hours of August 1. The town of Matnog sustained the worst damage from the typhoon, where 287 people died. It gradually became better organized, and on November 19, was first classified as a tropical cyclone. At this time, the system developed deep convection as well as good outflow. Initially, convection waxed and waned, but on November 17, the Joint Typhoon Warning Center (JTWC) started tracking the system. Copyright © 2020, University of Rhode Island. Sixty-one lives were lost in the nearby city of Verla, where 98% of all structures were either damaged or destroyed. Throughout the Philippines, approximately 114,000 people sought shelter, approximately 90,000 houses were destroyed, leaving more than 150,000 homeless. [25] Throughout the Sorsogon province, 80% of all crops were destroyed[26] and 90% of all homes were either damaged or destroyed. [5] Early on November 28, an eye once again became visible on satellite imagery. On 31 July, the storm slowed and turned northwestward before rapidly intensifying and shifting to the west-northwest. Chapter 3: “The World’s Most Catastrophic Dam failures” The storm reached typhoon status on 1 August and underwent explosive deepening- reconnaissance aircraft data indicated a 63 mb (hPa) drop in sea level pressure at the typhoon center, with maximum surface winds increasing from 120 km/h to 240 km/h (75 mph to 150 mph). During that period, it attained its peak intensity of 135 kn (155 mph, 250 km/h). [25] Around 11,000 lb (5,000 kg) of rice was donated for use in eight provinces,[25] and on December 1, an additional 35,000 lb (16,000 kg) of aid was airlifted to the region. A well defined trough line extending southeastward into the Philippine Sea spawned a disturbance on July 29. A significantly weakened Nina (peak winds 110 km/h [69 mph]) made a second landfall as a tropical storm near Jinjiang Fujian, China on 3 August. Elsewhere, in Boac, 80% of homes lost their roofs. However, the capital city of Manila avoided the brunt of the typhoon. After the typhoon traveled across Taiwan, it entered the Taiwan Straight (Formosa Strait), the body of water that separates the island from Mainland China. The track of Super Typhoon Nina. Several dams were intentionally destroyed by Chinese military air strikes in order to release water in desired directions in attempts to protect larger reservoirs and populations from the floodwaters. It began to turn to the northwest afterward. [32] In Bacacay, situated to the southeast of Legaspi, all but 15 of the town's 200 dwellings were leveled. [3] The stationary thunderstorm system brought heavy rainfall, causing the infamous collapse of the Banqiao Dam. The Shimantan Dam was built to withstand a 500-year flood, and had a flood storage capacity of 70.4 million cubic meters (the equivalent of 28.2 thousand Olympic swimming pools) and a height of 109.7 m (360 ft).

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