Intense rainfall and flood alerts persist in Northern and Northeastern regions as the monsoon intensifies
**Thailand Braces for Heightened Flood and Wave Risks Amidst Monsoon Conditions**
Thailand is currently facing increased flood and wave risks, as a strong monsoon trough and an active southwest monsoon continue to influence weather patterns across the country. According to the INFORM risk index, Thailand’s flood risk in 2025 remains very high, emphasizing the vulnerability of the country to flooding incidents this year.
In the North and Upper Northeast regions, a strong monsoon trough stretches across the area, causing isolated heavy to very heavy rains with widespread thundershowers in provinces such as Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, and others. This has heightened the risk of flash floods and runoff, particularly near foothills, rivers, and low-lying areas. Residents in these regions are advised to be on high alert for flash floods and run-off, especially near these vulnerable spots.
Similar isolated very heavy rains are forecast for the East, increasing the chance of flash floods and local flooding. Provinces such as Nakhon Nayok, Prachin Buri, Chachoengsao, Chonburi, Rayong, Chanthaburi, and Trat are expected to experience these conditions.
Heavy rain warnings have been issued for Bangkok and 49 provinces in total, with a 70% chance of intense downpours, raising concerns about urban flooding. Mariners are strongly advised to exercise caution, avoid sailing through stormy areas, and heed warnings about possible severe marine conditions.
At sea, waves in the upper Andaman Sea are expected to reach around 2 metres, rising above 2 metres in areas experiencing thunderstorms. In the lower Andaman Sea and the Gulf of Thailand, waves are forecast at 1-2 metres, with taller waves also likely during storms. All vessels in both seas should navigate with caution and avoid areas affected by thunderstorms.
The weather in Thailand is being affected by a moderate monsoon trough across upper Myanmar and the upper North, and a low-pressure cell over upper Laos. High waves are forecast in both the Andaman Sea and the Gulf of Thailand.
Residents, farmers, and seafarers alike are urged to take precautions due to these heightened flood and wave risks. Staying updated with official meteorological warnings is crucial. The situation remains dynamic as the monsoon trough and southwest monsoon continue to influence weather patterns across the country.
- businesses in the affected provinces should closely monitor the weather conditions and take necessary precautions to prevent disruptions due to the increased flood risks, while tourism industries could experience temporary slowdowns due to monsoon-related weather.
- environmental scientists are particularly concerned about the long-term implications of this year's high flood risks on Thailand's climate and environmental landscape, as prolonged flooding could exacerbate climate change and harm regional ecosystems.
- political leaders are encouraged to collaborate with weather experts, disaster management agencies, and local bodies to devise sustainable strategies for mitigating flood and wave risks in the future, given the high risk of flooding predicted by the INFORM risk index for 2025.
