BANGKOK, THAILAND – City officials warned of a “dangerous” heat index as extreme heat and isolated thunderstorms were expected across large parts of Thailand, urging people to pay close attention to health and safety in the coming days.
Bangkok: Heat index reached “dangerous” level
The Bangkok Metropolitan Administration (BMA) issued an official warning on Wednesday, 1 April 2026, after the city’s heat index rose into the “Dangerous” category.
The heat index described how hot it felt when both air temperature and humidity were taken into account.
Health authorities urged extra caution
Health authorities recommended that the public closely monitor their own physical condition and reduce strenuous activity.
They advised that particularly vulnerable groups should seek immediate medical attention if they experienced unusual symptoms indicating heat exhaustion.
Weather in Upper Thailand: Heat-driven low pressure
According to the Thai Meteorological Department (TMD), a heat-induced low-pressure cell was currently positioned over Upper Thailand.
This pattern brought generally hot daytime conditions and haze, with extreme heat expected in parts of the North, Northeast and Central regions.
Despite heat: Isolated thunderstorms and gusty winds possible
At the same time, weak southerly to southwesterly winds continued to blow, potentially triggering local thunderstorms and gusty winds.
Residents were urged to avoid prolonged outdoor activities and to stay alert for sudden storms, including the risk of falling trees or unsecured billboards.
Southern Thailand: Hot days, possible storms, mostly calm seas
In the South, daytime conditions also remained hot, accompanied by isolated thunderstorms as easterly and southeasterly winds moved over the Gulf of Thailand and the Andaman Sea.
Seas were generally considered relatively calm with waves around 1 metre, but wave heights could exceed 1 metre during thunderstorms.
Seven-day outlook: Heat to persist, agriculture urged to prepare
The TMD’s seven-day outlook for 1–7 April indicated that extreme heat would persist across much of Upper Thailand.
Farmers were called on to secure agricultural structures and prepare for potential damage to crops and livestock caused by changing weather conditions.
Air quality in North and Northeast remained a concern
In the North and Northeast, air quality remained worrying, as haze and fine particulate matter (PM2.5) continued to accumulate at relatively high levels.
The report cited a high density of hotspots and poor air circulation in the affected regions as key reasons.
Earthquake in Myanmar: No impact on Thailand
In a separate report, an earthquake with a magnitude of 2.1 was recorded in Myanmar between 31 March and 1 April.
Authorities confirmed that the event had no impact on Thailand.