A significant wildfire at Khao Chom Hae in Rayong, Thailand, has burned over 20,000 rai (approximately 7,900 acres) for more than five days, consuming around 30% of the forest. As of January 25, 2025, PM2.5 levels in the area reached 80 µg/m³, significantly exceeding the unhealthy threshold of 37.5 µg/m³. This deterioration in air quality has raised serious health concerns, especially in Bangkok, where KResearch estimates that the air quality decline has cost the economy at least 3 billion baht (US$89.3 million) this month. Alarmingly, 40 out of 50 districts in Bangkok have been classified as red zones, with PM2.5 readings of 75 µg/m³ or higher [f401341f].
In response to the escalating air pollution crisis, the Bangkok Metropolitan Administration has implemented measures to mitigate emissions, including offering free public transport for one week. This initiative is expected to cost taxpayers an estimated 140 million baht (US$4.17 million) [f401341f]. The wildfire and resulting dust pollution not only pose a health risk but also threaten the local economy, prompting urgent action from authorities to address the situation and protect public health [f401341f].