Much of northern Thailand as far south as Saraburi lay under a heavy blanket of haze and smoke Friday from hundreds of fires, mostly set on purpose by farmers in Thailand and Myanmar.
This shot of Chiang Mai taken by MCOT on Thursday shows the extent of haze across the North, caused by fires in Thailand and Myanmar.
The crisis areas were spotted in the far North, the lower North and upper Central provinces. Saraburi, where the air quality index (AQI) touched a dangerous 104 at noon Friday, had an air pollution index of 128 which, roughly translated, means "sensitive groups such as children, older people and asthmatics should stay indoors".
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