Bangkok: The National Water Resources Management Agency (NWRA) is intensifying its preparations to address the potential impact of El Ni±o by revising its water management strategies. The government has directed the National Water Resources Office (NWRO) to adjust its plans to manage the anticipated dry spell from the end of June to mid-July and to prepare for risks associated with the El Ni±o phenomenon later this year. All agencies have been ordered to monitor the water situation closely, reserve water for consumption and agriculture, and manage resources strictly to minimize the public impact.
According to Thai News Agency, Mr. Chayant Muangsong, Secretary-General of the NWRO, noted that weather monitoring in collaboration with the Meteorological Department and the Water Resources Information Institute indicates that Thailand is entering a drought period from late June to mid-July 2026. This is attributed to a northward shift of a low-pressure trough, leading to a temporary reduction in rainfall.
The National Water Resources Management Committee (NWRC) has emphasized continuous monitoring of the El Ni±o situation, as assessments suggest a 63% likelihood of developing a very severe phase by late 2026 to early 2027. This could lead to decreased rainfall, higher temperatures, and increased risks to water management.
Mr. Chayant reported that Deputy Prime Minister Songsak Thongsri expressed concern and instructed the NWRO to work with relevant agencies to monitor weather and water levels closely and plan countermeasures to mitigate public impact. The NWRO conducts twice-daily assessments of the water situation to inform management and warning systems.
Despite some areas facing potential heavy rainfall and risks of flash floods and landslides, overall rainfall is about 10% below average. The NWRC has ordered strict implementation of measures to manage the 2026 rainy season and ensure readiness to assist the public when needed.
As of June 19, 2026, reservoirs hold 45,026 million cubic meters of water, equating to 56% of storage capacity, with usable water at 37%. The central and eastern regions, at 29% and 35% capacity respectively, require close monitoring. The four main dams in the Chao Phraya River basin also necessitate attention due to low water levels.
The NWRO has coordinated with the Royal Irrigation Department and the Electricity Generating Authority of Thailand to adjust water management plans, conserving water for essential uses and agriculture during droughts. High water level sources will be filled rapidly to balance and prepare for future El Ni±o risks.
Additionally, the NWRA is developing a new rainfall forecasting model to improve runoff volume analysis, flood and landslide prediction, and the efficiency of water management and early warning systems in the future.