New York: Deadly floods across the globe have underscored the urgent need for faster and more comprehensive warning systems, according to the United Nations’ weather agency. The World Meteorological Organization (WMO) has linked the recent devastating floods to rapid urbanization, land-use changes, and climate change, which are contributing to the increased frequency and intensity of such events.
According to United Nations, the WMO reported that more intense downpours and glacier outburst floods are becoming more frequent, leading to deadly consequences for unprepared communities. Stefan Uhlenbrook, WMO Director of Hydrology, Water and Cryosphere, emphasized that while flash floods are not new, their escalating frequency and severity are a result of ongoing urbanization and climate change.
Floods, which claim thousands of lives annually and cause billions in damage, have had significant impacts in recent years. In 2020, South Asia experienced severe flooding, resulting in over 6,500 deaths and $105 billion in economic losses. Similarly, catastrophic floods in Pakistan in 2022 left over 1,700 people dead, affected 33 million people, and caused losses exceeding $40 billion, reversing years of developmental progress.
In July of this year, regions such as South Asia, East Asia, and the United States experienced a series of deadly flood events, including monsoon rains, glacial lake bursts, and flash floods. In India and Pakistan, heavy monsoon rains disrupted transport links, destroyed homes, and triggered landslides. Pakistan declared a state of emergency in the worst-hit areas, deploying military helicopters for rescue operations.
South Korea faced record-breaking downpours from July 16 to 20, with some areas experiencing over 115 mm of rainfall per hour, resulting in at least 18 deaths and the evacuation of more than 13,000 people. In southern China, authorities issued flash flood and landslide alerts following Typhoon Wipha, highlighting the compounded risks of sequential storms.
In Texas, a sudden flash flood between July 3 and 4 turned the Hill Country into a disaster zone. Over 100 people were killed, and dozens went missing as 10-18 inches of rain inundated the Guadalupe River basin. Many victims, including young girls at a summer camp, were caught unaware as floodwaters surged through their sleeping quarters.
Not all floods were rain-induced. In Nepal’s Rasuwa district, a glacier outburst on July 7 swept away hydropower plants, a major bridge, and trade routes, killing at least 11 people and leaving more than a dozen missing. Scientists from the International Centre for Integrated Mountain Development report that glacial-origin floods in the Hindu Kush-Himalaya region are occurring more frequently, with the potential risk tripling by the century’s end if warming continues.
To address these challenges, the WMO is enhancing flood forecasting through a global initiative and real-time guidance platform, now utilized in over 70 countries. This system integrates satellite data, radar, and high-resolution weather models to provide advanced warnings, aiming to establish a globally interoperable framework led by individual countries.
A 2022 World Bank study highlighted that 1.81 billion people, nearly a quarter of the global population, are directly exposed to 1-in-100-year flood events, with 89 percent residing in low- and middle-income countries.