Flash floods are among the world’s deadliest natural disasters with more than 5 000 lives lost annually. Their social, economic and environmental impacts are significant. Accounting for approximately 85% of flooding cases, flash floods also have the highest mortality rate among different classes of flooding, including riverine and coastal. Flash floods differ from river floods in their short time scales and occurrence on small spatial scales, which makes flash flood forecasting a different challenge from large-river flood forecasting.
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Extremely Severe Cyclonic Storm Mocha made landfall on 14 May in Myanmar, near the border with Bangladesh, accompanied by sustained winds of 180-190 km/h and violent gusts, torrential rainfall and flooding. The WMO community provided forecasts and meteorological support to humanitarian agencies to help them mobilize against this dangerous threat for hundreds of thousands of extremely vulnerable people.
Normal to below normal rainfall is likely during the 2023 southwest monsoon season (June – September) over most parts of the South Asia, according to the WMO-backed South Asian Climate Outlook Forum (SASCOF).
Normal to above normal rainfall is most likely during the 2022 southwest monsoon season (June – September) over most parts of the South Asia, according to an authoritative seasonal forecast from the South Asian Climate Outlook Forum.
The World Meteorological Organization and India Meteorological Department (IMD) have held a two-day regional workshop on the proposed Hydrological Status and Outlook System (HydroSOS) in the Ganga Brahmaputra Meghna (GBM) River Basin.
Activities on capacity building and improvements of early warnings of flash floods – one of the deadliest natural hazards, in South Asia region are advancing with the South Asia Flash Flood Guidance System (SAsiaFFGS) Radar Hydrology Training.