
In August 2025, Southeast Asia has endured an exceptional heatwave, breaking numerous August temperature records across the region.
In Nam Dinh, Vietnam, thermometers soared to 39.5 °C (103.1 °F), an unprecedented August high for the city.
Across the border in Thailand, several provinces also experienced record-breaking heat. Tak and Kosum Phisai both registered 38.2 °C (100.8 °F), while Chaiyaphum and Yala reached 37.7 °C (99.9 °F). Chok Chai followed closely with 37.5 °C (99.5 °F). These temperatures are extraordinary for August, which normally marks the wet season with cooler conditions.
Even coastal and island locations were not spared. Coco Island, Myanmar, saw a blistering 35.5 °C (95.9 °F), the highest August reading in its history. The persistence of such high temperatures in traditionally humid and rainy months points to an intensification of regional climate anomalies.
Meteorologists attribute this heatwave to a combination of suppressed monsoon activity, an extensive high-pressure ridge, and elevated sea surface temperatures in surrounding waters. The result has been extended periods of clear skies, reduced rainfall, and a buildup of heat across lowland and inland regions.
This extreme heat raises serious concerns for public health, agriculture, and water resources. It can lead to crop stress, reduced yields, and increased demand for cooling and irrigation. Authorities are warning residents to limit outdoor activities during peak daytime hours and to maintain hydration to prevent heat-related illnesses.
The August 2025 records in Vietnam, Thailand, and Myanmar add to a growing list of unprecedented heat events worldwide, underscoring the global nature of climate change and the urgent need for regional adaptation strategies.

Illustration picture: https://allpointseast.com/tours/south-thailand-tour-mountains-and-rainforests/