In Chiang Mai, what should be a celebration of Songkran is instead marked with thick smog. Farmers are burning their fields after harvest season to make ends meet, resulting to a haze that is driving away tourists.

https://www.theguardian.com/world/2026/apr/15/thailand-chiang-mai-tourism-air-pollution-war-price-spikes

Chiang Mai’s New Year revelry hit by smog and war-related price spikes

Air pollution caused by wildfires is another blow to northern Thailand’s tourism industry as businesses suffer amid war in Iran

The Guardian