Thailand Braces for Severe Heat Season, Heatstroke Risk High
Bangkok, Thailand – March 16, 2026 – Thailand’s Department of Disease Control (DDC) has issued a critical public health warning as the country enters its hot season, which typically lasts from late February to mid-May. Authorities are urging citizens to take precautions against heatstroke, a potentially fatal condition, particularly impacting vulnerable populations.
Rising Temperatures and Recent Heat-Related Illnesses
The DDC’s warning comes after a concerning number of heat-related illnesses and deaths were recorded in 2025. Data from the Digital Disease Surveillance system revealed 182 heat-related illness cases 1, with 21 resulting in fatalities 2. This year, temperatures are expected to be even more severe than in 2025, potentially reaching a heat index of up to 59.5°C 3.
Who is Most at Risk?
Certain groups are particularly vulnerable to heatstroke. The DDC has identified the following as high-risk: 3
- Older adults
- Young children
- Pregnant women
- Outdoor workers (including soldiers and laborers)
- Athletes
- Individuals with chronic illnesses (cardiovascular disease, obesity, diabetes)
In 2025, the majority of heat-related illness cases (42.8%) occurred in individuals aged 15-34, with a significant portion (15.9%) among those 60 and over 1. More than half of all cases involved people working outdoors 2.
Understanding Heat-Related Illnesses
Heatstroke is the most severe form of heat-related illness, but other conditions can also occur. In 2025, the most common conditions reported were:
- Heat exhaustion (34.07%) 1
- Heat syncope (dizziness or fainting) (23.63%) 2
- Heat cramps (14.29%) 1
- Heat stroke (9.34%) 1
Recognizing the Symptoms of Heatstroke
Heatstroke occurs when the body can no longer regulate its internal temperature, especially in temperatures exceeding 40°C 3. Warning signs include:
- Very high body temperature
- Hot, flushed skin
- Lack of sweating
- Dizziness
- Nausea and vomiting
- Palpitations
- Confusion
- Weakness
- Loss of consciousness
- Severe neurological symptoms (seizures, incoherent speech)
If someone exhibits these symptoms, immediate medical attention is crucial. Contact emergency services at 1669.
First Aid for Heatstroke
Whereas awaiting medical assistance, provide the following first aid:
- Lay the patient flat.
- Loosen tight clothing.
- Cool the body with a cold, wet cloth applied to the neck, armpits, head, and body.
- Use a fan to help lower body temperature.
- If the patient is unconscious, place them on their side to prevent airway obstruction.
Preventive Measures
To protect against heatstroke, the DDC recommends the following precautions 3:
- Avoid outdoor activities between 11:00 AM and 3:00 PM.
- Rest regularly in shaded areas.
- Drink at least six to eight glasses of clean water daily, before feeling thirsty.
- Avoid alcohol, caffeine, and sugary drinks.
- Wear loose-fitting, light-colored clothing.
- Never exit children or pets in parked cars.
Regional Impact of Heat-Related Deaths in 2025
In 2025, the Northeast region of Thailand experienced the highest number of heat-related deaths (52%), followed by the Central and Western regions (24%) 2. Udon Thani province recorded the highest number of fatalities with five deaths, followed by Nakhon Ratchasima with two 2. Approximately 28.5% of those who died were laborers 2.
The DDC urges the public to stay informed about weather forecasts and seek immediate medical attention if they experience any unusual heat-related symptoms. For more information, contact the DDC hotline at 1422.
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