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ONWR orders dynamic water plan as Thailand rainfall is 12% below normal
ONWR orders dynamic water plan as Thailand rainfall is 12% below normal
SUNDAY, JUNE 28, 2026
Agencies were told to prioritise rainwater and conserve reservoir supplies, with dry spells forecast in some areas from July's second week.Thailand faces harsher dry spell as El Niño fuels weather risks, ONWR warns
Thailand faces harsher dry spell as El Niño fuels weather risks, ONWR warns
MONDAY, JUNE 22, 2026
ONWR warns Thailand faces a longer dry spell, heatwaves, drought risks and possible flash floods as El Niño affects weather through 2026ONWR monitors five Thai reservoirs above maximum storage levels
ONWR monitors five Thai reservoirs above maximum storage levels
THURSDAY, JUNE 18, 2026
Rain was reported in every region on Wednesday (June 17, 2026), with Buri Ram recording the country’s highest rainfall at 74 millimetres.ONWR warns high tides could affect seven provinces in Thailand
ONWR warns high tides could affect seven provinces in Thailand
SUNDAY, JUNE 14, 2026
The warning covers Monday (June 15, 2026) to Thursday (June 18, 2026), with low-lying riverside communities urged to prepare for overflow and saltwater intrusion.Heavy rain raises overflow risk in low-lying areas, RID warns
Heavy rain raises overflow risk in low-lying areas, RID warns
THURSDAY, JUNE 04, 2026
The Royal Irrigation Department warns of heavy accumulated rain from June 4-10, with low-lying and foothill areas at flood riskONWR puts six provinces on flood alert as heavy rain hits Thailand
ONWR puts six provinces on flood alert as heavy rain hits Thailand
MONDAY, JUNE 01, 2026
Thailand’s water authorities have warned of possible flooding, flash floods, forest run-off and mudslides in six eastern and southern provinces as a strong south-west monsoon and monsoon trough bring heavy rain.ONWR warns 15 provinces across Thailand of heavy rain and flood risk
ONWR warns 15 provinces across Thailand of heavy rain and flood risk
SUNDAY, MAY 31, 2026
Rainfall may exceed 100mm within 12 hours in parts of Thailand between Friday (May 29, 2026) and Monday (June 1, 2026), with Phuket under close watch.ONWR warns four major dams exceed upper storage curve
ONWR warns four major dams exceed upper storage curve
WEDNESDAY, MAY 27, 2026
ONWR warns of heavy rain from May 28-31 as four major dams exceed their upper storage curve and 27 medium reservoirs top 80%Phetchabun districts warned of heavy rain, floods and landslides
Phetchabun districts warned of heavy rain, floods and landslides
THURSDAY, MAY 14, 2026
DDPM has warned of heavy rain in three Phetchabun districts, while 37 provinces have been placed on flood watch from May 15 to 18 as heavier rainfall is expected across Thailand.ONWR warns of summer storm from April 28 as national water storage drops to 60%
ONWR warns of summer storm from April 28 as national water storage drops to 60%
MONDAY, APRIL 27, 2026
Thailand’s ONWR has warned of summer storms from April 28 to May 1, while total reservoir storage stands at 60% and key Chao Phraya and EEC dams remain under close monitoring.