Тропический шторм "Тельма" (Уринг): крупнейшее наводнение на Филиппинах в 1991 году.

Pacific tropical storm in 1991

Tropical Storm Thelma, known in the Philippines as Tropical Storm Uring, was one of the deadliest tropical cyclones in Philippine history, killing at least 5,081 people. Forming out of a tropical disturbance on November 1, 1991, several hundred kilometers north northeast of Palau, the depression that would become Thelma tracked generally westward. After turning southwestward in response to a cold front, the system intensified into a tropical storm on November 4 as it approached the Philippines. Hours before moving over the Visayas, Thelma attained its peak intensity with estimated ten minute sustained winds of and a barometric pressure of 992 mbar (hPa; 29.29 inHg). Despite moving over land, the system weakened only slightly, emerging over the South China Sea on November 6 while retaining gale force winds. Thelma ultimately succumbed to wind shear and degraded to a tropical depression. On November 8, the depression made landfall in Southern Vietnam before dissipating hours later. While passing over the Philippines, Thelma's interaction with the high terrain of some of the islands resulted in torrential rainfall. Through the process of orographic lift, much of the Visayas received of rain; however, on Leyte Island there was a localized downpour that brought totals to With the majority of this falling in a three hour span, an unprecedented flash flood took place on the island. Much of the land had been deforestated or poorly cultivated and was unable to absorb most of the rain, creating a large runoff. This water overwhelmed the Anilao–Malbasag watershed and rushed downstream. Ormoc City, located past where the Anilao and Malbasag rivers converge, suffered the brunt of the flood. In just three hours, the city was devastated with thousands of homes damaged or destroyed. A total of 4,922 people were killed in the city alone, with 2,300 perishing along the riverbank. Outside of Ormoc City, 159 people were killed across Leyte and Negros Occidental. Throughout the country, at least 5,081 people died while another 1,941–3,084 were missing and presumed dead. This made Thelma the deadliest tropical cyclone in Philippine history, surpassing a storm in 1867 that killed 1,800, until later surpassed by Typhoon Haiyan (Yolanda) in 2013 which killed at least 6,300 people. A total of 4,446 homes were destroyed while another 22,229 were damaged. Total losses amounted to $27.67 million. Initially, it took over 24 hours for word of the disaster to reach officials due to a crippled communication network around Ormoc City. Within a few days, emergency supply centers were established and aid from various agencies under the United Nations and several countries flowed into the country. A total of $5.8 million worth of grants and materials was provided collectively in the international relief effort.

In late October 1991, a tropical disturbance developed near the Caroline Islands. Tracking generally west northwestward, the system gradually became more defined. On October 31, convection associated with the system quickly increased, prompting the issuance of a Tropical Cyclone Formation Alert from the Joint Typhoon Warning Center (JTWC). Early on November 1, the Japan Meteorological Agency (JMA) began monitoring the system as a tropical depression, at which time the system was situated roughly north northeast of Palau. Following a satellite derived surface wind estimate of later that day, the JTWC also began monitoring the low as a tropical depression. Initially, forecast models showed the system continuing on an arcing path out to sea; however, the system turned westward on November 2 and threatened the Philippines. Late on November 3, the depression turned west southwestward towards the Visayas in response to an approaching cold front, an event typical of late season cyclones in the basin. On November 4, both the JTWC and JMA upgraded the system to a tropical storm, with the former assigning it as Thelma. Once in the Andaman Sea, the systems remnants contributed to the formation of the Karaikal tropical cyclone during the next day. Striking the nation as a weak tropical storm, winds from Thelma gusted up to in Tacloban; these winds caused no known damage. The main destructive force associated with the cyclone was the tremendous rainfall it produced. More than of rain across much of the Visayas, resulting in widespread flooding.

Tropical Storm Thelma devastated the city of Ormoc after torrential rains overwhelmed the Anilao–Malbasag watershed, sending flood waters rushing down the deforested mountainside. Altogether, rains were twice as heavy as the land could handle and the many landslips doubled the volume of fluids. At various points along rivers, temporary dams created by debris, namely trees, allowed a build up of water upstream. In some instances, waters reached a depth of before the dams collapsed. Around 11:00 a. m. local time on November 5, approximately of water inundated of the city. Residents reported hundreds of bodies floating down rivers in the area. The force of the water and mud was enough to crack the walls of city hall. In the city alone, officials confirmed that 4,922 people were killed and another 1,857–3,000 were left missing. Additionally, 3,020 people were injured. Officials stated that the death toll could have been in the tens of thousands had the flood occurred at night rather than in the middle of the day. Initially, it took more than 24 hours for word of the level of devastation to reach officials in Manila as communications across Leyte were largely destroyed. A Philippine Navy vessel set out with heavy earth moving machinery and the Philippine Air Force deployed aircraft to assist in rescue efforts. Relief efforts in Ormoc City were hampered by a lack of clear roads and fuel. Amateur radio reports stated that an AC 130 was able to land at a local airport but materials had to be moved by helicopter from there since roads were blocked. As decomposition set in, residents stated that "[the] putrid smell was unbearable." Even months after the storm, bodies were occasionally discovered, some found in drainage systems. Roads surrounding the city were finally cleared by November 12; however, electricity remained out. With the deployment of medical teams from Japan, hospitals in the region returned to full capacity. By November 22, electricity and water had been 70 percent and 60 percent restored, respectively. The emergency phase of assistance ended on November 29 and coordination of disaster relief was returned to the Philippines. By that time, national aid to Ormoc reached $1.1 million, with more than half coming from a presidential grant. Long term rehabilitation of the watershed was deemed necessary in addition to repairing infrastructure in Ormoc.