CHIANG RAI – Chiang Rai, Thailand, faced another harsh morning on March 27, 2026, as thick smoke from forest fires spread across the province. The sky turned dull gray, and visibility fell fast. At the same time, temperatures soared to 40 degrees Celsius, making it hard and unsafe for many people to spend time outside.
Officials called the situation serious. Smoke-filled air and intense heat created dangerous conditions, especially for children, older adults, and people with health issues.
Why Chiang Rai Is Dealing With Severe Haze
The heavy haze comes from forest fires in Chiang Rai and nearby areas. Dry seasonal weather has left plants and brush easy to ignite. At the same time, some land clearing and farm burning have added more smoke to the air. That smoke then settles over districts and lingers in the hot, still conditions.
On March 27, the Air Quality Index (AQI⁺) climbed to unsafe levels in several areas:
- Mueang District (Nang Lae Subdistrict): 313, very unhealthy
- Mae Sai District (Wiang Phang Kham Subdistrict): 282
- Mae Fah Luang District: 252
- Mae Chan District: 245
These readings are far above healthy limits. PM2.5, which comes mostly from burning, is the main reason air quality has dropped so sharply. During Thailand’s dry season, especially in March, experts say biomass burning is the biggest source of this pollution.
Across Chiang Rai, the haze covered the sky from end to end. Many residents said it felt like living inside a cloud of smoke. With temperatures hitting 40°C, the air also felt thick, hot, and irritating.
How Heat and Haze Are Affecting Daily Life
The extreme heat made the situation even harder. Many people reported eye irritation, stuffy noses, and general discomfort. Children and older adults felt the effects more quickly. Breathing polluted air in such high heat also made simple daily tasks feel exhausting.
A resident in Mueang District said, “You walk outside and your eyes start burning right away. The children can’t play, and my parents stay inside with the fans running.” Similar stories came from many neighborhoods across the province.
Health officials remain concerned about the risks. High PM2.5 levels can worsen asthma, trigger breathing trouble, and irritate the eyes and throat. In more serious cases, it can put added stress on the heart and lungs.
Official Warnings and Safety Tips From Authorities
The Chiang Rai Provincial Disaster Prevention and Mitigation Office (PDPMO) quickly issued a warning and urged residents to protect themselves right away.
Officials advised people to:
- Wear a proper dust mask, such as an N95, when going outdoors
- Avoid unnecessary outdoor activity, especially during the hottest hours
- Stay inside with windows closed, and use an air purifier if possible
- Drink plenty of water to prevent dehydration in the 40°C heat
- Get medical help quickly if symptoms appear, such as coughing, shortness of breath, dizziness, or severe eye irritation
The PDPMO also said vulnerable groups need extra care. That includes older adults, young children, pregnant women, and anyone with existing breathing problems.
Because of the poor air quality, some schools and businesses changed their schedules. In many places, children stayed indoors during recess, while some activities moved into air-conditioned rooms.
Why Northern Thailand Faces Haze Every Year
This kind of seasonal haze is a familiar problem in northern Thailand. Each year, provinces such as Chiang Rai deal with smoke from forest fires and farm burning. Because the weather stays hot and dry, pollution often gets trapped close to the ground.
Smoke from fires in Myanmar and Laos can also drift across the border and worsen local conditions. Officials have tried to work with neighboring countries, but the problem often grows during the peak burning season.
Experts point to several causes. These include slash-and-burn farming, land clearing, and wildfires that spread out of control. Low rainfall and very high temperatures also make the problem worse.
This year, the mix of extreme heat and active fire hotspots pushed air pollution into dangerous territory in many districts.
How Residents Can Protect Themselves
While people wait for rain to improve the air, a few simple steps can lower their exposure to smoke:
- Check real-time AQI apps or local air quality updates before going out
- Cut back on outdoor exercise and heavy work
- Use saline eye drops or nasal sprays for relief, after checking with a doctor
- Keep indoor air clean by avoiding smoking or burning incense inside
- Prepare basic emergency supplies, including masks, water, and needed medicines
At the same time, communities are asking residents to report uncontrolled fires quickly so officials can respond faster.
When Conditions May Improve
Weather experts say the haze often starts to ease once the rainy season arrives in April or May. Until then, officials are tracking hotspots and warning people not to start new fires.
The provincial government is also working with national agencies to deal with the crisis. Some areas have already called for more support, including mask handouts and water spraying to reduce dust.
For now, the message is simple: stay indoors when possible, protect your health, and take official warnings seriously.
This difficult day in Chiang Rai shows how tough the yearly fight against seasonal air pollution has become in northern Thailand. Residents are now hoping for rain, lower temperatures, and clearer skies soon.
