According to Bangkok Post, Smog levels have worsened in Bangkok with high pollution readings and the health-hazardous pollution was reported in 34 out of Bangkok’s 50 districts on 20 January. In other provinces, unsafe PM2.5 levels were reported in Ayutthaya, Chachoengsao, Chiang Rai, Chon Buri, Kanchanaburi, Lampang, Loei, Nakhon Pathom, Nakhon Ratchasima, Nakhon Sawan, Nan, Nonthaburi, Pathum Thani, Phayao, Phrae, Prachin Buri, Ratchaburi, Rayong, Sa Kaeo, Samut Prakan, Samut Sakhon, Saraburi and Suphan Buri.